├── 1000-1100 ├── ** Beautiful String- 1265A ├── ** Group- 1598B ├── ** Shortest path to the king- 3A ├── **Captain flint and long voyage- 1388B ├── **City day- 1199A ├── **Diwan and project- 1614B ├── **King's escape- 1033A ├── **Numbers on whiteboard- 1430C ├── **Transformation from a to b-727A ├── **Unlucky digit- 160B ├── *Absent remainder- 1613B ├── *Badge-1020B ├── *Broken Keyboard- 1251A ├── *Cashier- 1059A ├── *Chat room-58A ├── *Chaunga-Chaunga- 1181A ├── *Chess tournament -1569B ├── *Chocolates- 1139B ├── *Circle of students- 1203A ├── *Competitive Programmer - 1266A ├── *Contest start- 1539A ├── *Dizzy Loves String- 447B ├── *Double ended string-1506C ├── *Drinks Choosing- 1195A ├── *Ehab and subtraction- 1088B ├── *Fair Game- 1411B ├── *Good old number coloring- 1245A ├── *Heating -1260A ├── *Johnny and ancient calculator- 1362A ├── *K-string- 219A ├── *Launch of Collider- 699A ├── *Lucky sum of digits- 109A ├── *Maria breaks the self isolation- 1358B ├── *Max-Mex cut- 1566C ├── *Number box- 1447B ├── *Red and blue-1469B ├── *Scenes from a memory- 1562B ├── *Social Network-1234B1 ├── *Social Network-1234B2 ├── *Sum of Digts-102B ├── *Valera and X- 404A ├── *Watching a movie- 499A ├── *Xenia and Ring road- 339B ├── -Geometry- Vasya and cornfield ├── 2048 Game- 1221A ├── 3-Palindrome- 805B ├── ABBB- 1428C ├── Add and divide- 1485A ├── Also try minecraft- 1709B ├── Amr and Music- 507A ├── Ania and minimizing- 1230B ├── Appleman and easy task- 462A ├── Arpa's hard exam- 742A ├── Array Cancellation-1405B ├── Asphalting roads-583A ├── Assigning to class-1300B ├── BAN BAN-1747B ├── Balanced rating changes- 1237A ├── Balanced remainder -1480B ├── Balls of steel- 1450B ├── Bear and finding criminal- 680B ├── Bear and rapsberry- 385A ├── Benches- 1042A ├── Berlands Poker- 1359A ├── Binary removal- 1499B ├── Board Moves- 1353C ├── Bobinou likes to color balls- 1395A ├── Bogosort- 1312B ├── Books Exchanged-1249B1 ├── BowWow and timetable- 1204A ├── Buttons-268B ├── Buying a TV set- 1041B ├── Buying torches-1418A ├── Calculator- CALC ├── Candy bags- 334A ├── Character Swap- 1243B1 ├── Circle game- 1695B ├── Cormen- the best friend of man- 732B ├── Crossword solving- 822B ├── Currency system in Geraladion- 560A ├── Dasha and Stairs- 761A ├── Detective book- 1140A ├── Dice tower- 1266B ├── Different divisors-1474B ├── Different is good- 672B ├── Digital root- 1107B ├── Dima and friend-272A ├── Disturbed people- 1077B ├── Diverse Substring- 1073A ├── Donut shop- 1373A ├── Doremon and stairs-476A ├── Dragon-230A ├── Drazil and date - 515A ├── Ehab fails to be a thanos- 1174A ├── Eternal immortality- 869B ├── Exam- 534A ├── Expression- 479A ├── Fake NP- 805A ├── Filling shapes -1182A ├── Find Amir- 804A ├── Football- 43A ├── Fox and the number Game- 389A ├── Free Cash- 237A ├── Fridge lockers- 1255B ├── Game 23-1141A ├── Godsend- 841B ├── Grasshopper and the string- 733A ├── Grow the tree- 1248B ├── Happy birthday Polycrap- 1277A ├── High school: became human- 987B ├── Integer Diversity-2021A ├── Integer Points- 1248A ├── Jeff and digits-352A ├── Joe is on TV-1293B ├── Jzzhu and children-450A ├── K divisible sum-1476A ├── Lecture-499B ├── Life without zeroes-75A ├── Little Artem-1333A ├── Little elephant and function- 221A ├── Lovely Palindromes-688B ├── Lucky Division- 122A ├── MIXor MIXup- 1567B ├── Magic Stick-1257B ├── Mahmud and longest uncommon subsequence- 766A ├── Mahmud and triangle- 766B ├── Maximum cost deletion- 1550B ├── Middle of the contest- 1133A ├── Mike and palindrome- 798A ├── Minimum Extraction- 1607C ├── Minimum Integer- 1101A ├── Move Bracket- 1374C ├── Multiplication Table- 577A ├── NIT destroys universe- 1696B ├── Nastie and nearly good no-1521A ├── New Theatre Square- 1359B ├── New Year transportation- 500A ├── New Year's Candle- 379A ├── Not adjacent matrix- 1520C ├── Number of position-124A ├── Olesya and Rodion- 548A ├── Palindromic twist- 1027A ├── Pasha and stick-610A ├── Permutation minimization by deque- 1579E1 ├── Petr and book-139A ├── Phoenix and puzzle- 1515B ├── Pillars- 1197B ├── Pizza ,Pizza and pizza- 979A ├── Polycrap Training- 1165B ├── Present from lena-118B ├── Raising bacteria- 579A ├── Regular Bracket sequence- 1469A ├── Relatively prime pairs- 1051B ├── Reverse Sort- 1605B ├── Reverse a substring- 1155A ├── Road to zero- 1342A ├── Roadside Trees- 265B ├── Rooms and stairs- 1244B ├── Round House- 659A ├── Sage's Birthday- 1419D1 ├── Save more mice- 1593C ├── Shuffle hasing- 1278A ├── Sifera- 114A ├── Single Push- 1253A ├── Stable arrangements of rook- 1621A ├── String Equalization- 1223B ├── String LCM-1473B ├── String Task- 118A ├── Subrectangle guess- 1695A ├── Supercentral point- 165A ├── Superhero transformation- 1111A ├── TV subscription- 1225B1 ├── Theatre square-1A ├── Towers -37A ├── Two Shuffled array- 1144C ├── Ugly bad number- 1326A ├── Valera and antique items- 441A ├── Valeria against everyone- 1438B ├── Water Lily -1199B ├── XOR mixup- 1698A ├── Young Physicist- 69A └── cAPS LOCK-131A ├── 1100-1200 ├── ** Ebony and Ivory -633A ├── ** Equidistant string- 545B ├── ** Strange List- 1474B ├── *** Card deck-1492B ├── *** Shifting sort- 1579B ├── *** Two arrays- 1417B ├── *** William the vigilant- 1609B ├── ***All the vowels please- 1166B ├── ***Carrot cakes- 799A ├── ***Divine array- 1602B ├── ***Game on ranges- 1623B ├── ***Kalindrome Array- 1610B ├── ***L ord of the values- 1523B ├── ***Math problem -1227A ├── ***Parade -733B ├── ***Squares and segments- 1099B ├── ***Visiting a friend- 902A ├── **Airport- 218B ├── **Anton and classes- 785B ├── **Combinatorics homework- 1574B ├── **Elementary particles- 1625B ├── **Exercising walk- 1332A ├── **Fence- 363B ├── **GCD array- 1629B ├── **Geometry- Gleb and Pizza- 842B ├── **Histogram ugliness- 1534B ├── **Lala land and apple trees- 558A ├── **Paint the array- 1618C ├── **Repainting street -1415B ├── **Salem and sticks- 1196A ├── **Sitting arrangements- 1566D1 ├── **Update file- 1606B ├── **Weird subtraction process- 946B ├── *A new technique -1413B ├── *Aalyona and numbers- 682A ├── *Berland's Music- 1622A ├── *Bobinou plays chess- 1395B ├── *DeadLine- 1288A ├── *Divisor of 2 integers- 1108B ├── *Double Cola- 82A ├── *Effective approach- 227B ├── *GCD compression- 1370B ├── *Good number- 365A ├── *Ilya's and Queue- 313B ├── *Knights- 1112B ├── *Long Jump- 1472C ├── *Matrix game- 1365A ├── *Meeting of old friends- 714A ├── *Minimum Product- 1409B ├── *Minor Reduction- 1626B ├── *Misha and changing handles- 501B ├── *Moamen and k subarrays- 1557B ├── *Muh and sticks- 471A ├── *New Colony- 1481B ├── *Partial replacement- 1506B ├── *Passwords- 721B ├── *Prison transfer- 427B ├── *Remainder- 1165A ├── *Sereja and suffix- 368B ├── *Similar pairs- 1360C ├── *Snacktower- 767A ├── *Songs compression- 1015C ├── *Sweet Problem- 1623A ├── *TMT Document- 1409B ├── *Ternary sequence- 1401B ├── *Text document analysis- 723B ├── *The number on your board- 835A ├── *Vova and train -1066A ├── *Yet another card deck ├── *Zuhair and string -1105B ├── *map*Luxurious house- 581B ├── A and B compilation error- 519B ├── AND sorting- 1682B ├── Aahaha- 1407A ├── Alex and broken contest- 877A ├── All are same- 1591D1 ├── Array -300A ├── Artful and expident -869A ├── Bad Prices-1213B ├── Badges- 1214B ├── BasketBall- together- 1725B ├── Best subsegment -1113A ├── Big segment- 242B ├── Binary Period- 1342B ├── Blown garland- 758B ├── Boys and girls -253A ├── Caisa and Pylons- 463B ├── Cinema Line- 349A ├── Comparing strings- 186A ├── Conner and ARC Markland- 1293A ├── Counterexample- 483A ├── Dungeon -1463A ├── Elections- 570A ├── Equidistant letters- 1626A ├── Fancy fence- 270A ├── Frog Jumps- 1324C ├── GCD length- 1506B ├── Giga tower-488A ├── IQ test- 287A ├── Ilya and colorful walk- 1119A ├── Increase and copy- 1426C ├── Infinite sequence- 675A ├── Initial bet- 478A ├── Joystick- 651A ├── Kind Anton-1333A ├── Kitahara Haruki gift- 433A ├── Laptops- 456A ├── Letter- 43B ├── Little elephant and bits- 258A ├── Little elephant and magic score- 295A ├── Little pigs and wolves- 116B ├── Longest palindrome- 1304B ├── Lucky number- 630C ├── Mainak and Array - 1726A ├── Max and Mex -1496B ├── Merge it- 1176B ├── Middle Class- 1334B ├── Mike and fax- 548A ├── Nearest minimum -911A ├── Nezzar and lucky number- 1478B ├── Non-coprime partition- 1038B ├── Number Circle- 1189B ├── Pair programming- 1547C ├── Parallelopiped- 224A ├── Perfect No- 919B ├── Petya and country side- 66B ├── Petya and staircases- 362B ├── Ping pong- 1455C ├── Playing with paper -527A ├── Polandball and games- 755B ├── Possible gcd- DISTGCD (Codechef) ├── Putting bricks on the wall- 1421B ├── Rank List- 166A ├── Reachable number- 1157A ├── Regular bracket sequence -1132A ├── Safid and strange sequences- 1529B ├── Sequential Nim-1382B ├── Shovel and swords-1366A ├── Sign flipping- 1375A ├── Slightly decreasing permutations- 285A ├── Substrings sort- 988B ├── Subtract operations- 1656B ├── Sum of cubes-1490C ├── Sum of odd integers- 1327A ├── Tavas and Saddas- 535B ├── Taxi- 158B ├── The fibonacci segment- 365B ├── Two teams composing-1335C ├── Vitya and the countryside- 719A ├── Weird rounding- 779B ├── Wilbur and array- 596B ├── XOR- specialist- 1604B ├── Yaroslav and permutation- 296A ├── Yet another meme problem -1288B └── Yet another palindrome problem- 1324B ├── 1200-1300 ├── ** Rock and liver- 1420B ├── ** Worms -474B ├── *** Wrong addition- 1619C ├── **** Square filling- 1207B ├── ****Belted rooms- 1428B ├── ****Build the permutation- 1608B ├── ****Email from Polycrap- 1185B ├── ****Morning jogging - 1517B ├── ****Pursuit- 1530C ├── ****Student and shoelaces- 129B ├── ****Ternary string(Binary + sliding) - 1345B ├── ***Alice, Bob and chocolate- 6C ├── ***Aquaman and stolen string- 1546B ├── ***Christmas spruce- 916B ├── ***Coloring a tree- 902B ├── ***Delete 2 elements- 1598C ├── ***Escape from stones- 264A ├── ***Flip the bits- 1504B ├── ***Grandma Knits- 1582C ├── ***Hexadecimal's Numbers- 9C ├── ***Lecture sleep- 961B ├── ***New year and the treasure geolocation- 1091B ├── ***Nirvana- 1143B ├── ***Planning the expedition- 1011B ├── ***Poisoned dagger- 1613C ├── ***Replace and keep sorted- 1485B ├── ***Repost- 522A ├── ***Sail- 298B ├── ***Sequence transformation- 1454C ├── ***Shower line- 431B ├── ***Three parts of the array- 1006C ├── **A-B Palindrome- 1512C ├── **AccurateLee- 1369B ├── **Almost equal- 1205A ├── **Alphabetical removal- 999C ├── **Alternating subsequence- 1343C ├── **Bad sequence- 1214C ├── **Boat competition- 1399C ├── **Boxes packing- 903C ├── **Cell under attack- 701B ├── **Common prefixes - 1384A ├── **Cutting- 998B ├── **District connection- 1433B ├── **Exam in Bersu -1185C1 ├── **Ice skating- 271A ├── **Kirill and the game- 842A ├── **LCM- 1068B ├── **Make them odd- 1277B ├── **Make them equal- 1594C ├── **Mex and array- 1637B ├── **Minimal cost- 1491B ├── **Mocha and hiking- 1559C ├── **Neighbor grid- 1375B ├── **Obtaining a string- 1015B ├── **Omkar and heavenly tree- 1583B ├── **Pleasant pairs- 1465B ├── **Polycarp's practice- 1006B ├── **Restricted RPS- 1245B ├── **Sanatorium -732C ├── **Sorted adjacent differences- 1339B ├── **Stable group- 1529C ├── **Stairs- 1419B ├── **Table tennis- 879B ├── **Tanya and candies- 1185B ├── **The bits- 1017B ├── **Vitamins- 1042B ├── **Weird sort- 1311B ├── **XXXXX- 1364A ├── **Xenia and divisors- 342A ├── *Beautiful painting- 651B ├── *Block adventure- 1200B ├── *Book reading -1213C ├── *Chloe and the sequence- 743B ├── *Collecting packages- 1294B ├── *Diamond miner- 1495A ├── *Divisor calculation- 1076B ├── *Equal rectangle- 1203B ├── *Flipping game- 327A ├── *George and Round- 387B ├── *Hungry sequence- 327B ├── *Johnny and his hobbies- 1362B ├── *Kuriyama Mirai's stone- 433B ├── *M-arrays- 1497B ├── *Magical calendar- 1371B ├── *Make it good -1385C ├── *Maximum product- 1406B ├── *Not sitting - 1627B ├── *Prinzessin der Verurteilung- 1536B ├── *Same parity summands- 1352B ├── *Stripe- 18C ├── *Yet another broken keyboard- 1272C ├── Alyona and mex- 682B ├── Ancient Civilization- 1625A ├── And 0, and sum big- 1514B ├── Appleman and toastman- 461A ├── Bags of potatoes- 239A ├── Balanced team- 1133C ├── Before exam -4B ├── Bersu ball -489B ├── Birthday- 1131C ├── Bracket Sequence Deletion- 1657C ├── Building permutation- 285C ├── Cat cycle- 1487B ├── Challenging cliffs- 1537C ├── Chat order- 637B ├── Cheap travel -466A ├── Chewbaccaa and number- 514A ├── Classroom watch -875A ├── Corner- 1720C ├── Corrupted array- 1514D ├── Creating the contest- 1029B ├── Death's Blessing- 1749B ├── Devu the dumb guy- 439B ├── Dishonest seller- 779C ├── Dominated subarray- 1257C ├── Domino -353A ├── Door breaking and repairing- 1102C ├── Double sort- 1681C ├── Dzy loves chessboard- 445A ├── Ehab is an odd person -1174B ├── Even-odd game- 1472D ├── Fedya and maths- 456B ├── Find marble- 285B ├── Flya and homework- 714B ├── Football kit- 432B ├── Game with string -1105B ├── Game with telephone number- 1155B ├── Good string -1140B ├── Hemose shopping -1592B ├── Interesting subarray- 1270B ├── Jumbo Extra Cheese 2- 1740B ├── Jumps- 1455B ├── K-LCM- 1497C1 ├── Kth not divisible by n- 1352C ├── Kuroni and simple strings- 1305B ├── Less or equal- 977C ├── Level statistics -1334A ├── Little pony and sort by shift- 454B ├── Make equal with mod- 1656C ├── Make them equal- 1153B ├── Minimizing the string- 1076A ├── Minimum triangulation- 1140D ├── Monster- 787A ├── NN and optimal illusion- 1100C ├── Next test- 27A ├── Odd selection- 1363A ├── Odd sum segment -1196B ├── Omkar and waterslide- 1392C ├── Palindrome game- 1527B1 ├── Palindromic Numbers- 1700B ├── Pashmak and garden -459A ├── Penalty- 1553C ├── Perfect team- 1221C ├── Permutation transformation- 1490D ├── Petr and combination lock -1097B ├── Prefix sum primes- 1149A ├── Preparation for international women's day- 1133B ├── Princesses and prince- 1377B ├── Restoring permutation- 1315C ├── Reverse binary string -1437B ├── Scuza- 1742E ├── Sequence with digits- 1355A ├── Sherlock and his girlfriend- 776B ├── Snow walking robot- 1272B ├── Soldier and badges- 546B ├── Sort Zero- 1712C ├── Swap Game- 1747C ├── TL- 350A ├── Tanya and toys- 659C ├── Ternary XOR- 1328C ├── Thermostat - 1759C ├── Tokitsuzake and Mahjong- 1191B ├── Two cakes- 911B ├── Vanya and books- 552B ├── Vanya and lanterns- 492B ├── Vladik- 748A ├── War of corporations- 625B ├── Yet another array restoration- 1409C └── Young explorers- 1355B ├── 1300-1400 ├── ***(Math) Meme problem - 1076C ├── *****Charmed by the game- 1558A ├── *****Deep down below- 1561C ├── ****Beautiful numbers- 1265B ├── ****Box fitting- 1498B ├── ****Chat ban- 1612C ├── ****Take your places- 1556B ├── ***Coin row- 1555C ├── ***Getting zeroes- 1661B ├── ***Just eat it- 1285B(Kadane) ├── ***Letters shop- 1187B ├── ***Mahmoud and bipartitieness- 862B ├── ***Many equal substrings- 1029A ├── ***Move and turn -1459B ├── ***Nashtya and door- 1341B ├── ***Number into sequence- 1454D ├── ***Paparika and permutation- 1617C ├── ***Perform the combo -1311C ├── ***Planet Lapituletti- 1483B ├── ***Save the city- 1443B ├── ***Shuffle- 1366B ├── ***Substring removal -1063B ├── ***TV subscription- 1225B2 ├── ***Wow factor- 1178B ├── ***Yet another cross problem- 1194B ├── **Accordian- 1101B ├── **Anti-soduko- 1335D ├── **Array sharpening- 1291B ├── **Arrays and operations- 1618D ├── **Balanced tunnel- 1237B ├── **Binary string construction- 1003B ├── **Blocks- 1271B ├── **Brutality- 1107C ├── **Buying shovels- 1360D ├── **Canine poetry- 1466C ├── **Divisible confusion- 1603A ├── **Duff in love- 588B ├── **Inflation- 1476B ├── **Juzzhu and sequences- 450B ├── **Knapsack- 1446A ├── **Kth beautiful string- 1328B ├── **Lose it- 1176C ├── **Lucky number- 96B ├── **Most socially distanced subsequence- 1364B ├── **Nastia and a good array- 1521B ├── **Number of pairs- 1538C ├── **Product of 3 No's- 1294C ├── **Rumors- 893C ├── **Swords- 1216D ├── **Two Tables - 1555B ├── **Versa for Santa- 1279B ├── **Wet sharks and bishop- 621B ├── *Alice, Bob and candies- 1352D ├── *Andrew and stones- 1637C ├── *Build a contest- 1100B ├── *Co-growing sequence- 1547D ├── *Complete the word- 768B ├── *Counting divisors- 1203C ├── *Creating a character- 1217A ├── *Cut ribbon- 189A ├── *Ehab and a special coloring problem- 1174C ├── *Good numbers- 1249C1 ├── *Good string -1165C ├── *Make it a power of two- 1311D ├── *Multiplication table- 1220B ├── *Nice garland- 1108C ├── *Omkar and last class of math- 1372B ├── *Permutation partition- 1326C ├── *Plus and minuses- 1373C ├── *Plus from picture-1182B ├── *Reorder the array- 1007B ├── *Simple game - 570B ├── *Slay the ddragon- 1574C ├── *Social distance- 1367C ├── *Strange birthday party- 1370B ├── *To kill a monster- 1633C ├── *Unusual competitions- 1322A ├── *Vasya and isolated vertices- 1065B ├── *ill 'em all- 1238B ├── 3-Sum closure- 1698C ├── A and B team training- 519C ├── A cookie for you- 1371C ├── Anton and currency you all know- 508B ├── Appleman and card game- 462B ├── Archer- 312B ├── Array cloning technique- 1665B ├── Bear and poker- 574C ├── Beautiful array- 1715B ├── Big Vova- 1407B ├── Blue-red permutation- 1607D ├── Build permutation- 1713C ├── Chocolate- 617B ├── Cloning toys- 922A ├── Coins- 58B ├── Complementary XOR- 1750C ├── Cow and friend- 621B ├── Deadly laser- 1712B ├── Domino- 85A ├── Doremon and wifi - 476B ├── Easy number challenge- 236B ├── Equalize- 1037C ├── Equator-962A ├── From S to T- 1194C ├── Game of ball passing- 1649B ├── Garage- 1725G ├── Going to the Cinema - 1782B ├── Good Array -1077C ├── Good Subarrays (Easy Version)- 1736C1 ├── IQ test- 25A ├── Increasing subsequence - 1157C1 ├── Jeff and periods - 352B ├── Jumping on Tiles - 1729C ├── Little Alawn's puzzle- 1434C ├── Little elephant and problem- 220A ├── Little girl and game - 276B ├── Long number- 1157B ├── Madoka and Childish Pranks -1647C ├── Madoka and Underground Competitions- 1717B ├── Mainak and Interesting Sequence - 1726B ├── Make Nonzero Sum- 1754C1 ├── Masha and a Beautiful Tree- 1741D ├── Mere Array- 1401C ├── Modoka and formal statement- 1717C ├── Negative prefixes- 1418B ├── Neko performs cat furrier transform - 1152B ├── Next prime- 271B ├── Nice Matrix- 1422B ├── Obtain two zeroes- 1260B ├── Oh these palindrome- 1063A ├── Packets- 1037A ├── Pashmik and flowers- 459B ├── Permutation Operations - 1746C ├── Points on line- 251A ├── Pokemon's Army- 1420C1 ├── Poland and forest- 755C ├── Polygon- 1360E ├── Prefix Flip- 1381A1 ├── Queries about less or equal elements- 600B ├── Random teams- 478B ├── Reach median- 1037B ├── Road construction- 330B ├── Shawarma tent- 1271C ├── Sort the array- 451B ├── Summarize to the power of two- 1005C ├── T-primes- 230B ├── Tiles- 1178C ├── Trouble sort- 1365B ├── Two dance rounds- 1433E └── XOR tree- 429A ├── 1326. Minimum Number of Taps to Open to Water a Garden ├── 1400-1500 ├── ****Composite coloring -1332B ├── ****Find the array- 1463B ├── ****Mocha and Diana- 1559D1 ├── ****Swaps- 1573B ├── ***Adding powers- 1312C ├── ***And sequence - 1513B ├── ***Array splitting - 1197C ├── ***Berland Regional - 1519C ├── ***Berland crossword- 1494B ├── ***Epic transformation- 1506D ├── ***Fillomino 2 - 1517C ├── ***Find the spruce- 1461B ├── ***Karen and coffee- 816B ├── ***Maximum median- 1201C ├── ***Minimize the permutation- 1256B ├── ***Mr kitayuki's colorful graph- 505B ├── ***National project- 1303B ├── ***Orac and models- 1350B ├── ***Phoenix and tower- 1415C ├── ***Powers of two- 1095C ├── ***Productive meeting- 1579D ├── ***Rook defender- 1679C ├── ***The delivery dilemma- 1443C ├── ***Unstable string - 1535C ├── **Accidental victory- 1490E ├── **Add to neighbour and remove- 1462D ├── **Applejack and storage- 1393B ├── **Computer game- 1183C ├── **Dominant character- 1605C ├── **Dreamoon likes permutation- 1330B ├── **Element extermination- 1375C ├── **Filling the grid- 1228B ├── **Given length and sum of digits- 489C ├── **Graph theory- 1548A ├── **Great graphs- 1540A ├── **Greg and array -259A ├── **Han solo and lazer gun- 514B ├── **Journey Planning- 1320A ├── **Learning languages- 277A ├── **Make good- 1270C ├── **Neko's maze game- 1292A ├── **News distribution- 1167C ├── **Phoenix and beauty- 1348B ├── **Quasi binary- 538B ├── **Strange test- 1632C ├── **Sum of substring -1691C ├── **Three displays- 987C ├── **Toy block -1452B ├── **Vanya and exams- 492C ├── **Wonderful coloring- 1551B2 ├── **Zero remainder array- 1374D ├── *Color the picture- 1711C ├── *Inversion sort (Set theory)-1638C ├── *Pair of topics- 1324D ├── *Polo the penguin and matrix- 289B ├── *Rotation matching- 1365C ├── *Serial time- 60B ├── *Suffix operations- 1543B ├── 2 Buttons -520B ├── 2^sort- 1692G ├── 3SUM- 1692F ├── Adding digits- 260A ├── Alice and cake- 1654C ├── Amr and Puns- 507B ├── And matching - 1630A ├── Arranging the sheep- 1520E ├── Array deque- 1692E ├── As simple as one and two- 1276A ├── Awoo favorite problem- 1697C ├── Awoo's favourite problem- 1697C ├── Ball in berland- 1475C ├── Basketball exercise- 1195C ├── Books- 279B ├── Bricks and Bags- 1740C ├── Candy box- 1183D ├── Codechef- Removeadd ├── Coloring - 1774B ├── Column swapping -1684C ├── Connect- 1130C ├── Constanze's machine- 1245C ├── Create the team- 1380C ├── Directional increase- 1694C ├── Diverse Substrings- 1748B ├── Diverse garland- 1108D ├── Divide by 3 and multiply by 2- 977D ├── Drazil and factorials- 515C ├── Everyone is winner- 1263C ├── Exams- 479C ├── Fadi and LCM- 1285C ├── Fighting tournament- 1719C ├── Fixing typos- 363C ├── Game with array- 1355D ├── Hot Black Hot White - 1725H ├── I hate 1111- 1526B ├── Incinerate - 1763B ├── Johnny and another rating problem- 1362C ├── Koxia and Whiteboards - 1770A ├── Kth divisor- 762A ├── LIS or reverse LIS- 1682C ├── Letters- 116C ├── Mark and His Unfinished- 1705C Essay ├── Mashmokh and ACM- 240B ├── Min-max array transformation- 1721C ├── Number game- 1749C ├── Numbers Game- 1370C ├── Palindromifier- 1421C ├── Prefix Sum Addicts- 1738B ├── Preparing olympiad- 550B ├── Qpwoeirut and the city- 1706C ├── Quests- 1760F ├── RationalLee- 1369C ├── Regular Bracket Sequence- 26B ├── Simple polygon embedding- 1354C1 ├── Sorting by subsequences- 843B ├── Subsequence hate- 1363B ├── Suffix structures- 448B ├── Team- 401C ├── The child and the toy- 437C ├── Universal solution- 1380B ├── Vacations- 698A ├── Vasya and wrestling- 493B ├── Vlad and a Pair of Numbers- 1790E └── Watchmen- 650A ├── 1500-1600 ├── **(Interactive) Guess the Cycle Size - 1729E ├── **(Probability) Random events- 1461C ├── ***AAGYA XXXOOORRR- 1516B ├── ***Doremy's iq- 1707A ├── ***Fault Tolerant network- 1651C ├── ***Hierarchy-17B ├── ***Integer shop- 1621B ├── ***Make It Round - 1759D ├── **Add Modulo 10- 1714E ├── **Ayoub and the lost array- 1105C ├── **Backspace- 1553D ├── **Balanced bitstring- 1404A ├── **Divisibility by 8- 550C ├── **Dubious crypto- 1379B ├── **Edgy trees- 1139C ├── **Factorial and power of 2- 1646C ├── **Gas pipeline- 1207C ├── **Good sequences- 264B ├── **Journey-839C ├── **Knight Tournament- 356A ├── **Make it increasing -1668C ├── **Maximum product strikes back- 1660D ├── **Maximum width- 1492C ├── **Nikita and string- 877B ├── **Pipes- 1234C ├── **Pride- 891A ├── **Representative Edges- 1616C ├── **Secret password- 1263D ├── **Sweet eating- 1253C ├── **Vasya and multiset- 1051C ├── *A-good string- 1385D ├── *Air conditioner- 1304C ├── *Air conditioner- 1547E ├── *Diluv and Keya- 1536C ├── *Dolce vita- 1671C ├── *Jatayu's Balanced Bracket Sequence - 1726C ├── *K- complete word- 1332C ├── *Matrix and shift- 1660E ├── *Maximum crossing- 1672H2 ├── *Orray- 1742G ├── *Queue- 490B ├── *Sorting the coins- 875B ├── 24 game- 468A ├── 2A- Winner ├── A+B strikes back- 409H ├── Absolute Sorting- 1772D ├── Acacuis and string- 1379A ├── Almost All Multiples-1758C ├── Aquamoon and strange sort- 1546C ├── Balance-1732D1 ├── Bear and friendship condition- 771A ├── Binary string reconstruction- 1352F ├── Binary string to subsequence- 1399D ├── Breaking the wall- 1674E ├── Burning midnight oil- 165B ├── Cow and message -1303C ├── Cthulhu- 103B ├── Cut'em all- 982C ├── Cyclic components- 977E ├── Cyclic permutation- 1391C ├── Divisible Numbers (easy version)- 1744E1 ├── Doremy's City Construction-1764C ├── Ela and Crickets- 1737C ├── Even Number Addicts - 1738C ├── Even-Odd XOR- 1722G ├── Good key, bad key- 1703G ├── Good string -1389C ├── Interesting function-1538F ├── Jeopardy of dropped balls- 1575B ├── K-amazing numbers-1416A ├── Kefa and Company- 580B ├── Killjoy- 1419C ├── Knowledge Cards- 1740D ├── Least Prefix Sum- 1779C ├── Line empire- 1659C ├── Little girl and maximum sum- 276C ├── Make Nonzero Sum- 1753A2 ├── Minimum ties- 1487C ├── Mortal combat tower- 1418C ├── Moscow Gorillas - 1793D ├── Nastya and Strange Generator- 1340A ├── Number Reduction- 1765N ├── Party- 177C1 ├── Phase Shift- 1735C ├── Phoenix and socks- 1515D ├── Powered Addition- 1338A ├── Promising string-1660F1 ├── Remove one element - 1272D ├── Sending a Sequence Over the Network - 1741E ├── Skyscrapers- 1313C1 ├── Smaller - 1742F ├── The Humanoid-1759E ├── Torus Path - 1765K ├── Two substrings- 550A ├── Vasya and string- 676C ├── Woodcutters - 545C └── Yet another walking robot- 1296C ├── 1600-1700 ├── (Pigeon Hole Principle) Koxia and Number Theory - 1770C ├── ** Remove the substring(Hard version)- 1203D2 ├── *** Erase and extend- 1537E1 ├── ****Add one- 1315C ├── ****Price fixed- 1539D ├── ***Cat party- Hard- 1163B2 ├── ***Digital logarithm- 1728C ├── ***Gardner and tree 1593E.cpp ├── ***Hard problem- 706C ├── ***Longest simple cycle- 1476C ├── ***Maximum sum of product- 1519D ├── ***Monoblock -1715C ├── ***Recover on RBS-1709C ├── ***Rorororobot- 1709D- (max segment tree) ├── ***Sequence pair weight- 1257C ├── ***Social network- 1609D ├── ***Spreadsheet- 1B ├── ***Tree infection- 1665C ├── **Array walk- 1369B ├── **Balanced heap stone- 1623C ├── **Basic diplomacy- 1482C ├── **Binary string- 1680C ├── **Building a fence- 1469C ├── **Carrying conundrums- 1567C ├── **Catching overflow- 1175B ├── **Color with occurences- 1714D ├── **Compression and expansion- 1523C ├── **Cow and sequence- 283A ├── **Desktop arrangement- 1674F ├── **Destroying array- 722C ├── **Divide and summarize - 1461D ├── **Dzy loves sequences- 446A ├── **Fixed point guessing- 1698D ├── **Gambling- 1692H ├── **Infected tree- 1689C ├── **Insert a progression- 1671D ├── **K-tree- 431C ├── **Kadane- Maximum sum on even -1373D ├── **Linova and kingdom- 1336A ├── **Meeting on the Line - 1730B ├── **Obtain the strings -1295C ├── **P-sort- 28B ├── **Price maximization- 1690E ├── **Tokitsukaze and Strange Inequality- 1678C ├── **Two arrays- 1288C ├── **Virus- 1704C ├── **Zero-Sum Prefixes- 1748C ├── *Booking system- 416C ├── *Lakes in Berland- 723D ├── *Mind control- 1290A ├── *RGB substring- 1196D2 ├── *Seating arrangement- 1566D2 ├── *Thor- 704A ├── *Timofey and a tree- 763A ├── 388535 - 1658D1 ├── Almost identical permutations- 888D ├── Alternating current- 343B ├── Anya and smartphone- 518C ├── Boboniu and bit operation- 1395C ├── Bombs- 350C ├── Boris and His Amazing Haircut- 1779D ├── Burenka and Traditions- 1718A2 ├── Candy Store - 1798C ├── Circular dance- 1095D ├── Counting Rectangles - 1722E ├── Ehab and prefix MEX- 1364C ├── Even Subarray ├── Factorial Divisibility- 1753B ├── Game with chips- 1327C ├── Good subarray- 1398C ├── Grid 00100- 1371D ├── Hamburgers- 371C ├── Hossam and Trainees - 1771C ├── Interesting Sequence - 1775C ├── Joty and chocolates- 678C ├── Love rescue- 939D ├── MEX maximizing - 1294D ├── Manipulating history- 1688C ├── Maze- 377A ├── Merge equals- 962D ├── Moving both hands- 1725H ├── New reform- 659E ├── New year permutation- 500B ├── Perfect keyboard- 1303C ├── Permutation Game- 1772E ├── Potions- 1526C2 ├── Remove the substring- 1203D1 ├── Replacement- 570C ├── Robot on the board 1- 1607E ├── Rudolf and Snowflakes - 1846E2 ├── Same Count One - 1774D ├── Sasha and bit of relax- 1109A ├── Sequence and swaps- 1455D ├── Socks - 731C ├── Sum and Products - 1857F ├── The enchanted forest- 1688D ├── Valiant's New Map - 1731D └── Yet Another Tournament- 1783C ├── 1700-1800 ├── ***Water the trees- 1661C ├── **Card Game-1739C ├── **Chopping carrots- 1706D1 1 ├── **Cyclic rotation- 1672D ├── **Path Prefixes- 1714F ├── **Shinju and the lost permutation- 1658C ├── **Very suspicious- 1670D ├── *Harmonious graph- 1253D ├── *Helping the nature- 1700C ├── *L-shapes- 1722F ├── *Required length- 1681D ├── *String transformation- 1383A ├── *Traps- 1684D ├── Bit Guessing Game - 1780D ├── Climbing the tree - 1810D ├── Deleting divisors- 1537D ├── Different Arrays - 1783D ├── Equal Frequencies - 1782C ├── Equate multiset- 1702F ├── Fake plastic trees- 1693B ├── Friendly Spiders- 1775D ├── Gardening Friends - 1822F ├── Good Sequence - GSEQ ├── Journey- 1476D ├── Lucky Chains- 1766D ├── Minimal string- 797C ├── Problem with Random Tests - 1743D ├── Railway System -1687B ├── Shifting strings- 1690F ├── SlavicG's Favorite Problem- 1760G ├── Solve the maze- 1365D ├── Split and sum(codechef) ├── The third problem- 1699C ├── Watch the Videos - 1765D ├── Zero path └── kth-equality -1836C ├── 1800-1900 ├── Buying gifts- 1802D ├── Letter Picking -1728D └── Many Perfect Squares- 1781D ├── 1900-2000 ├── Dasha and Nightmares - 1800F ├── Divisible Numbers (hard version)- 1744E2 ├── Lost Arithmetic progression- 1673D ├── Max GEQ sum- 1691D ├── Rescheduling the exam- 1650E └── Teleporters (Hard Version)- 1791G2 ├── 2316. Count Unreachable Pairs of Nodes in an Undirected Graph ├── 2528. Maximize the Minimum Powered City ├── 800-900 ├── 1052A- Determine line ├── 1250F- Data centre ├── 2 Regular Polygon ├── Accumulations of Dominos - 1725A ├── Almost Rectangle-1512B ├── Alphabetical Strings-1547B ├── Another String Game-1480A ├── Arena-1487A ├── Array balancing- 1661A ├── Average Height-1509A ├── Balanced String-1569A ├── Ball Game-46A ├── Bank Robbery- 794A ├── Be Positive-1130A ├── Bear and reverse Radewoosh- 658A ├── Cakeminator - 330A ├── Cancel the train - 1453A ├── Captain Flint and crew recruitment- 1388A ├── Cards-1220A ├── Cherry-1554A ├── Chores-873A ├── Colorful Stones (Simplified Edition)-265A ├── Consecutive Sum Riddle- 1594A ├── Deja vu- 1504A ├── Digits Sum-1553A ├── Diplomats and certificates-818A ├── Doors and keys- 1644A ├── Elections-1043A ├── Erasing Zeroes-1303A ├── Ezzat and two sequence- 1557A ├── Find the array-1550A ├── Fix you - 1391B ├── Friends meeting-931A ├── Frog Jumping-1077A ├── Game Outcomes-157A ├── Game with cards- 1681A ├── Gamers Hemose- 1592A ├── George and pawn game- 1549B ├── Good Matrix Element-177A1 ├── Good Pairs - 1656A ├── Greg's workout - 255A ├── Haiku-78A ├── Infinity Table-1560C ├── LLPS-202A ├── Last Year's Substring-1462B ├── Madoka and Strange Thoughts- 1717A ├── Madoka and maths dad- 1647A ├── Mean inequality- 1526A ├── Minimum and maximums- 1680A ├── Miracle and the sleeper- 1562A ├── NIT orz- 1696A ├── Nezzar and Colorful balls-1478A ├── Okabe and future gadget-821A ├── Optimal path- 1700A ├── Palindrome indices- 1682A ├── Password Check-411A ├── Patrick and shopping-599.txt ├── Perfectly imperfect array - 1514A ├── Piles with stones-1013A ├── Playoff- 1651A ├── Potion Making-1525A ├── Professor Gukitz's robot- 620A ├── Prove him wrong - 1651B ├── Puzzle Pieces-1345A ├── Repeating cipher- 1095A ├── Review Site-1511A ├── Richie Rich ├── Robots- 1680B ├── Rounding- 898A ├── Santa and a place in class- 748A ├── Sereja and mugs- 426A ├── Space Navigation-1481A ├── Spyke Talks- 291A ├── Stock Arbitraging-1150A ├── Strange functions-1455A ├── Suborrays-1391A ├── Substring removal Game-1398B ├── Sum of 2050-1517A ├── Super Agent-12A ├── System of equations-214A ├── Technical support-1754A ├── The Ultimate Square- 1748A ├── Tit for tat- 1516A ├── Tokitsukaze and Good 01-String- 1678B1 ├── Tokitsukaze and all zero- 1678A ├── Triangular Numbers-47A ├── Two Rabbits 1304A ├── Uniform string - 1092 A ├── Vladik and courtesy-811A ├── Word Correction-938A ├── XORTwice - 1421A ├── Z mod X = C- 1684B └── hello ├── 900-1000 ├── * Parity alternated deletion-1144- ├── * Sum of Medians-1440B ├── **B-mail from computer- 1057A ├── *Sushi for two-1138A ├── *The great hero- 1480B ├── 01 Game- 1373B ├── 2 grams- 977B ├── 2-3 moves- 1716A ├── 3 Friend-1272A ├── A and B and a chess-519A ├── AB balance- 1606A ├── ABC string- 1494A ├── Alarm clock- 1354A ├── Almost prime-26A ├── Array Reordering-1535B ├── Array Stabilization- 1095B ├── Arrays- 572A ├── Avoiding zeroes-1427A ├── Bad Boy-1537B ├── Bark to Unlock- 868A ├── Business trip-149A ├── Candies division- 1283B ├── Candies-1343A ├── Cases of zeroes and ones-556A ├── Chips Moving-1213A ├── Construct the string-1335B ├── Contest- 501A ├── Cookies-129A ├── Cover Point- 1024B ├── Cowardly rooks- 1749A ├── Cube sorting-1420A ├── Customizing the track- 1543B ├── Decoding -765B ├── Delete from the left- 1005B ├── Deletive editing- 1666D ├── Devu, the Singer and Churu, the Joker-439A ├── Digit Game-1419A ├── Display the number-1295A ├── Distance and axis- 1401A ├── Dominant Piranha-1433C ├── Doramon and Ranking Collection-1330A ├── Download more RAM- 1629A ├── Dubstep- 208A ├── Duff and Meat- 588A ├── Elimination- 1445B ├── Equalize Price- 1193B ├── Even Odds- 318A ├── Even but not even-1291A ├── Exams- 194A ├── Exciting bets-1543A ├── Fast food restaurant- 1313A ├── Filling diamonds -1339A ├── Food Buying- 1296B ├── Football-96A ├── Forgetting things- 1225A ├── From hero to zero- 1175A ├── Game with sticks- 451A ├── Gravity Flips- 405A ├── HQ9+ - 133A ├── HexaDecimal theorem-199A ├── Holidays- 670A ├── Ilya and bank account-313A ├── Is it rated- 807A ├── Juicer- 709A ├── Kana and dragon quest game- 1337B ├── Kefa and first steps-580A ├── Keyboard- 474A ├── Letter rearranging- 1093B ├── Lights Out- 275A ├── Lineland Mail- 567A ├── Little elephant and rozdill- 205A ├── Lunch rush-276A ├── Magic Number- 320A ├── Make it divisible by 25-1593B ├── Makes Product equal zero-1206B ├── Mammoth genome decoding-747B ├── Maximal continuous rest -1141B ├── Maximums-1326B ├── Minimum difficulty- 496A ├── Mislove has lost an array- 1204B ├── Mocha and Maths-1559A ├── Mocha and red and blue- 1559B ├── Modular Exponentiation- 913A ├── Multiply by 2 ,divide by 6-1374 ├── Napolean cake- 1501B ├── Nastya and Rice- 1341A ├── New Year's Garland- 1279A ├── New Year's Number- 1475B ├── Non-string subsequence- 1451B ├── Not shading- 1627A ├── Number of Apartments-1430A ├── Oath of night's watch- 768A ├── Odd Grasshopper-1607B ├── Odd divisor-1475A ├── Orac and Factors- 1350A ├── Paint the Array- 1618C ├── Party- 115A ├── Permutation Sort- 1525B ├── PizzaForces-1555A ├── Prime Square-1436B ├── Prime Substraction-1238A ├── Protect sheep- 948A ├── Puzzles- 337A ├── Reversing encryption- 999B ├── Rising sand- 1698B ├── Sale- 34B ├── Sasha and her trip- 1113A ├── Shifting stacks-1468A ├── Shooting-1216B ├── Sorting parts- 1637A ├── Split it-1496A ├── Strange Participation- 1471A ├── Subset Mex- 1406A ├── Symmetric matrix- 1426B ├── The time- 622B ├── Three Indices- 1380A ├── Tricky sum- 598A ├── Twins-160A ├── Unique Number- 1462C ├── Vasya and Socks- 460A ├── Wet shark and odd and even-621A ├── Wizard of Orz- 1467A ├── Xornacci- 1208A ├── Yet another tetris problem- 1324A └── perfect permutation- 1719A ├── BFS ├── $Cheapest path with k- stops - 787. Cheapest Flights Within K Stops ├── (Printing all shortest path)- Leetcode 126 ├── (Printing shortest path)- Friendly spiders- 1775D ├── **BFS vs DFS (Shortest distance) ├── **Two buttons- 520B ├── *Required length- 1681D ├── *Shortest path- Getting zero- 1661B ├── 1129. Shortest Path with Alternating Colors ├── 1162. As Far from Land as Possible ├── 1926. Nearest Exit from Entrance in Maze ├── 2045. Second Minimum Time to Reach Destination ├── 2246. Longest Path With Different Adjacent Characters ├── 2646. Minimize the Total Price of the Trips ├── 785. Is Graph Bipartite? ├── 834. Sum of Distances in Tree ├── Nearest Black Vertex- abc299e ├── Perfect keyboard- 1303C ├── Shortest dis b-w 2 nodes in directed graph- Leetcode- 2359 └── X and Y tree - XYTREE ├── Backtracking └── 1718. Construct the Lexicographically Largest Valid Sequence ├── Binary search ├── (Binary sequence+ lower_bound)- 1249C1 ├── (Math) Chat ban-1612C ├── * Poisoned Dagger- 1613C ├── **** (Doubles)Iterating for doubles - 1730B ├── ***Letters shop- 1187B ├── ***Water the trees- 1661C ├── **Deep down below- 1561C ├── **Pursuit- 1530C ├── **Rescheduling the exam- 1650E ├── *Dolce vita- 1671C ├── *Perfect team- 1221C ├── 1011. Capacity To Ship Packages Within D Days ├── 1095. Find in Mountain Array ├── 1146. Snapshot Array ├── 2 cakes- 911B ├── 2251. Number of Flowers in Full Bloom ├── 2382. Maximum Segment Sum After Removals (Leetcode) ├── 2411. Smallest Subarrays With Maximum Bitwise OR ├── 2439. Minimize Maximum of Array ├── 2560. House Robber IV ├── 2602. Minimum Operations to Make All Array Elements Equal ├── 670D1-Magic Powder ├── 670D2-Magic Powder ├── Accidental victory- 1490E ├── Booking system- 416C ├── Burning midnight oil- 165B ├── Card construction-1345B ├── Chopping carrots- 1706D1 ├── Coins and triangles- TRICOIN ├── Computer game- 1183C ├── Creating a character- 1217A ├── Deadline- 1288A ├── Hamburgers- 371C ├── Inflation- 1476B ├── Interesting drinks-708B ├── Kefa and Company- 580B ├── Kth beautiful string- 1328B ├── Let's watch football- 195A ├── Letters- 978C ├── Median Maximization-1566A ├── Multiplication Table- 448D ├── Number of pairs- 1538C(Upper_bound & Lower_bound) ├── Palindrome coloring- 1624D ├── Path prefixes- 1714F ├── Planning the expedition- 1011B ├── Queries about less or equal elements- 600B ├── Queue- 540D ├── Slay the dragon- 1574C ├── Sports Mafia- 1192B ├── Stacks- STACKS ├── String Game- 778A ├── Teleporters (Hard Version)- 1791G2 ├── Ternary Search │ └── Freefall- atcoder beg 279 D ├── Ternary string - 1345B ├── Vasya and string -676C └── Worms- 474B ├── Bitmask ├── (Comparing bit by bit & also a imp pattern)** Array elimination- 1601A.cpp ├── * XOR specialist- 1604B ├── **(64bits)- Interesting Sequence - 1775C ├── **(Sequence)Doremon and WIFI- 476B ├── **(a^b)^(c^d) = a^b^c^d ├── ***(Comparing bit-by-bit)Co-growing sequence- 1547D ├── ****2D sequence selection- 1799. Maximize Score After N Operation ├── ***Ancient civilization- 1625A ├── ***Penalty- 1553C ├── ***Special Numbers- 1594B ├── **AAGYA XXXOOORRR- 1516B ├── **Factorials and power of 2- 1646C ├── **Hacker rank- Counter Game ├── **Niko performs cat furrier transform- 1152B ├── **Petr and combination lock -1097B ├── **Powers of two- 1095C ├── *And sequence- 1513B ├── *Boboniu and bit operation- 1395C ├── *Johnny and another rating problem- 1362C ├── 1371. Find the Longest Substring Containing Vowels in Even Counts ├── 3133. Minimum Array End ├── 388535 - 1658D1 ├── And 0, and sum big- 1514B ├── Bit Guessing Game - 1780D ├── Chefs Favourite Function- CHEFFFUNC ├── Codechef - Existence Of X ├── Dasha and Nightmares - 1800F ├── Even Subarrays - 1731C ├── Fedor and the new game- 467B ├── Johnny and his hobbies- 1362B ├── Little elephant and bits- 258A ├── Longest Subarray - LONGESTARRAY ├── Lucky number- 96B (sequence) ├── Make good- 1270C ├── Orray- 1742G ├── Preparing olympiad- 550B ├── Rock and Lever- 1420B ├── Strange test- 1632C ├── Tavas and Saddas- 535B ├── XOR Construction - 1895D └── c8kbf and Tree - C8KBFTREE ├── Combinatorics ├── ("Factorials" Choosing and arranging)And sequence- 1513B ├── **2 Dance rounds- 1433E ├── *Good subarrays- 1398C ├── Adding combinations- Sequence pair weight- 1527C ├── Chocolate- 617B(ways to partition) ├── Combinatorics Homework- 1574B ├── Dearrangements + NCR- 888D ├── Points on line- 251A(making triplets) └── Substring removal from left and right- 1096B ├── DFS ├── $ In-out DFS - 2538. Difference Between Maximum and Minimum Price Sum ├── $**Matrix ---- Without using vis- 79. Word Search ├── $--(Sum of all sub-trees) 1519. Number of Nodes in the Sub-Tree With the Same Label ├── (Alternate to filling vis again & again)News distribution- 1167C ├── (Making diff. trees)*Timofey and a tree- 763A ├── *(Bipartite & Bfs & Dfs) - 2493. Divide Nodes Into the Maximum Number of Groups ├── **(Distance within tree) Cut'em all- 982C ├── **(Iterating into subtree)- 1676G (White-Black tree) ├── **(Iterating into tree's child)- Vlad 1675F ├── ***Bipartiteness - D - Make Bipartite 2- abc 282 ├── ***Cyclic components- 977E ├── ***Dfs+ Parallel color Pair vector- 505B ├── ***Mahumud and biparttiteness- 862B.cpp ├── **Infected tree- 1689C(Finding child) + binary tree ├── **Learning languages- 277A ├── **Little Alawn puzzle(GLOBAL declaration for multiple testcases)- 1534C ├── **Maze- 377A ├── **Repost- 522A (map ├── *Divide by three, multiply by 2- 977D ├── 1254. Number of Closed Islands ├── 1443. Minimum Time to Collect All Apples in a Tree ├── 2477. Minimum Fuel Cost to Report to the Capital ├── 2503. Maximum Number of Points From Grid Queries ├── 2556. Disconnect Path in a Binary Matrix by at Most One Flip ├── 2581. Count Number of Possible Root Nodes ├── 417. Pacific Atlantic Water Flow ├── At coder- Round Trip - abc276 E ├── Bmail Computer network- 1057A ├── Christmas spruce- 913B ├── Coloring a tree- 902B ├── Connect (In grid) -1130C ├── Count Simple Paths - abc284 E ├── Detecting cycle in directed graph - 1857. Largest Color Value in a Directed Graph ├── Ice skating- 271A (No. of connected components) ├── Jatayu's Balanced Bracket Sequence - 1726C ├── Journey- 839C (Probability) ├── L-shapes- 1722F ├── Lakes in Berland- 723D ├── Leetcode- (Largest cycle in directed graph))- 2360 ├── Leetcode- 2359. . Directed graph sortest distance b-w 2 nodes ├── Leetcode- Number of island 200 ├── Measuring dist- 103B ├── Path prefixes- 1714F ├── Poland and fore ├── Rumor- 893C ├── Serial time - 60A ├── SlavicG's Favorite Problem- 1760G ├── Solve the maze- 1365D └── XOR tree- 429A ├── DP ├── **(Art of writing state) Divisibility by 8- 550C ├── **(State of remainder) - Max Multiple - abc281 ├── *** LeetCode- 1770. Maximum Score from Performing Multiplication Operations ├── *** Obtain the string -1295C ├── *****(Matrix dp)- Star sky- 835C ├── *****Kadane - Maximum subarray ├── ***Add one- 1315C ├── ***Gas pipeline- 1207C ├── ***Longest Increasing Subsequence II- Leetcode - 2407 ├── ***Polycarp and div 3- 1005D ├── ***Three displays- 987C ├── ***Unstable string - 1535C ├── **1155. Number of Dice Rolls With Target Sum ├── **Hard problem- 706C ├── **K-tree- 431C ├── **Kadane- 918. Maximum Sum Circular Subarray ├── **Potions - 1526C1 ├── **Woodcutter- 545C ├── *Boredom- 455A ├── *Mortal combat tower- 1418C ├── 1035. Uncrossed Lines ├── 1140. Stone Game II ├── 1187. Make Array Strictly Increasing ├── 1335. Minimum Difficulty of a Job Schedule ├── 1406. Stone Game III ├── 1416. Restore The Array ├── 1547. Minimum Cost to Cut a Stick ├── 1575. Count All Possible Routes ├── 1626. (LIS) Best Team With No Conflicts ├── 1751. Maximum Number of Events That Can Be Attended II ├── 188. Best Time to Buy and Sell Stock IV- LEETCODE ├── 2140. Solving Questions With Brainpower ├── 2369. Check if There is a Valid Partition For The Array(Leeetcode) ├── 2466. Count Ways To Build Good Strings ├── 2484. Count Palindromic Subsequences ├── 2547. Minimum Cost to Split an Array ├── 2555. Maximize Win From Two Segments ├── 2719. Count of Integers ├── 2742. Painting the Walls ├── 45. Jump Game II ├── 472. Concatenated Words ├── 673. Number of Longest Increasing Subsequence ├── 688. Knight Probability in Chessboard ├── 956. Tallest Billboard ├── 983. Minimum Cost For Tickets ├── Ansifa the monkey- 44E ├── Ayoub and the lost array- 1105C ├── Basketball exercise- 1195C ├── Bitmasking on dp │ ├── **2572. Count the Number of Square-Free Subsets │ ├── 1125. Smallest Sufficient Team │ └── Vitamins- 1042B ├── CSES+ ATcoder │ ├── 1. Dice combination │ ├── 10. Edit distance (Recursion) │ ├── 11. Rectangle cutting (Recursion) │ ├── 12. Money sum │ ├── 13. Removal game │ ├── 14. Increasing subsequence (LIS) │ ├── 2. Coin combination I ( Having less cache misses) │ ├── 3. Coin combination 2 (Combinations only) │ ├── 4. Minimizing coin │ ├── 5. Removing digits │ ├── 6. Grid paths │ ├── 7. Book Shop │ ├── 8. Array description │ └── AtCoder │ │ ├── *Longest Paths │ │ ├── Coins │ │ ├── Frogs 1 │ │ ├── Frogs 2 │ │ ├── K-stones │ │ ├── Knapsack 1 │ │ ├── Knapsack 2( Dp on value) │ │ ├── LCS │ │ ├── Longest Path │ │ ├── Sushi │ │ ├── Takashi Jumping │ │ └── Vacations ├── Different Arrays - 1783D ├── Digit-Dp │ └── 2827. Number of Beautiful Integers in the Range ├── Don't Isolate Elements - abc283E ├── Even Number Addicts - 1738C ├── Grid- 2435. Paths in Matrix Whose Sum Is Divisible by ├── Hamiltonian Wall - 1766C ├── Kadane- 124. Binary Tree Maximum Path Sum ├── Leetcode Decode ways- 91 ├── Longest simple cycle- 1476C ├── Mashmokh and ACM- 240B ├── Orac and models- 1350B ├── Range Add Query -abc288D ├── Recursion- Maximum sum of products- 1519D ├── Sasha and bit of relax- 1109A ├── Tetrahedron -166E ├── Topics AV │ ├── Knapsack │ │ ├── *Original Knapsack │ │ ├── 1st Variation- Subset sum │ │ ├── 2. Equal Partition into 2 subset │ │ ├── 3. Subset sum count │ │ ├── 4. Minimum subset difference │ │ ├── 5. Count no. of subsets with given diff │ │ ├── 6. Target sum- Leetcode 494 │ │ └── Knapsack- weight subarray - 879. Profitable Schemes │ ├── Longest Common subsequence (LCS) │ │ ├── **Recursive approach │ │ ├── 10. Min. no of deletion to make palindrome │ │ ├── 11. (Recursion) Wildcard matching │ │ ├── 13. Longest repeating sequence │ │ ├── 14. Minimum no. of insertion to make string palindrome │ │ ├── 15. Longest palindromic substring- leetcode- 5 │ │ ├── 2. Memorization │ │ ├── 3. Top- Down │ │ ├── 4. Longest common substring │ │ ├── 5. Printing longest common subsequence │ │ ├── 6. Length of shortest supersequence │ │ ├── 7. Printing shortest supersequence │ │ ├── 8. Delete operation b-w 2 strings to make them equal │ │ ├── 8. Transforming string a into b using minimum operations (Insertion and deletion) │ │ ├── 9. Longest palindromic subsequence │ │ └── Maximizing LCS - MAXLCS │ ├── Longest increasing subsequence │ ├── Matrix chain multiplication │ │ ├── 1. Recursion + memorization │ │ ├── Egg dropping │ │ ├── Palindrome partitioning(Recursion+ Memorization) │ │ └── Scrambled string- Memorization │ └── Unbounded knapsack │ │ ├── 1. Maximum profit from rod cutting │ │ ├── 2. Coin change (Max ways to to an amount) - 518(leetcode) │ │ ├── 3. Coin change- Min amount of coin used to achieve sum. │ │ ├── Minimum Steps- Geeksforgeeks │ │ └── Unbounded knapsack- └── Vacations- 698A ├── Difference Array ├── ** Making entire array equal to a number for multiple queries ├── ****Greg and array - 295A ├── ***Karen and coffee- 816B ├── Brute rectangle prefix sum- Leetcode 363 ├── Diff array using map- 731. My Calendar II (LEETCODE) ├── Matrix range sum queries- 304 Leetcode and 835C CF ├── Prefix of XOR- Even subarray- 1731C ├── Prefix Sum - 1444. Number of Ways of Cutting a Pizza ├── TripTastic - TRPTSTIC └── Valiant's New Map - 1731D ├── Dijkstra ├── 2290. Minimum Obstacle Removal to Reach Corner ├── Moving Both Hands - 1725M ├── algorithm.cpp └── leetcode- 2290 Minimum obstacles to reach corner ├── Disjoint Set ├── ****Hierarchy (Different sets + making a Edge DS)-17B ├── ***Social network- 1609D ├── **Cyclic components- 977E ├── **Edgy tree- 1139C ├── **Harmonious graph- 1253D ├── **Mocha and Diana- 1559D1 ├── **Secret password- 1263 ├── **Shifting string- 1690F ├── **Sorting by subsequences- 843B ├── *String transformation- 1383A ├── *Where is pizza- 1670C ├── 1319. Number of Operations to Make Network Connected ├── 1579. Remove Max Number of Edges to Keep Graph Fully Traversable ├── 1697. Checking Existence of Edge Length Limited Paths ├── 2092. Find All People With Secret ├── 2421. Number of Good Paths ├── 839. Similar String Groups ├── Bear and friendship condition- 771A ├── Book Exchange- 1249B2 ├── DZY loves chemistry- 445B ├── Destroying array- 722C ├── Love rescue- 939D ├── Lucky Permutation -1768D ├── New reform- 659E ├── New year permutation- 500B ├── Party- 177C1 └── Socks - 731C ├── Divisors ├── (Counting divisors) Common divisors- 1203C ├── (Finding Divisors) Duff in love- 588B ├── 10^18 divisors Check not finding. Divisible Numbers-1744E2 ├── Hossam and Trainees - 1771C └── Lost Arithmetic progression- 1673D ├── Doubly Linked List └── 432. All O`one Data Structure ├── Floyd Warshall Algo - Shortest path ├── Algorithm └── Souvenir- abc286- E ├── Graph Theory ├── (Set-adjacency)Web of lies- 1548A ├── 2508. Add Edges to Make Degrees of All Nodes Even └── Detecting cycle in directed graph ├── KMP Algorithm └── Algorithm ├── Leetcode ├── 102. Binary Tree Level Order Traversal ├── 105. Construct Binary Tree from Preorder and Inorder Traversal ├── 1074. Number of Submatrices That Sum to Target ├── 108. Convert Sorted Array to Binary Search Tree ├── 114. Flatten Binary Tree to Linked List ├── 118. Pascal's Triangle ├── 1220. Count Vowels Permutation ├── 126. Word Ladder II ├── 13. Roman to Integer ├── 1338. Reduce Array Size to The Half ├── 1354. Construct Target Array With Multiple Sums ├── 1465. Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts ├── 1473. Paint House III ├── 1647. Minimum Deletions to Make Character Frequencies Unique ├── 1689. Partitioning Into Minimum Number Of Deci-Binary Numbers ├── 1696. Jump Game VI ├── 1710. Maximum Units on a Truck ├── 2321. Maximum Score Of Spliced Array ├── 234. Palindrome Linked List ├── 235. Lowest Common Ancestor of a Binary Search Tree ├── 236. Lowest Common Ancestor of a Binary Tree ├── 2360. Longest Cycle in a Graph ├── 2369. Check if There is a Valid Partition For The Array ├── 240. Search a 2D Matrix II ├── 242. Valid Anagram ├── 3. Longest Substring Without Repeating Characters ├── 30. Substring with Concatenation of All Words ├── 300. Longest Increasing Subsequence ├── 315. Count of Smaller Numbers After Self ├── 34. Find First and Last Position of Element in Sorted Array ├── 342. Power of Four ├── 377. Combination Sum IV ├── 378. Kth Smallest Element in a Sorted Matrix ├── 387. First Unique Character in a String ├── 406. Queue Reconstruction by Height ├── 458. Poor Pigs ├── 462. Minimum Moves to Equal Array Elements II ├── 473. Matchsticks to Square ├── 49. Group Anagrams ├── 576. Out of Boundary Paths ├── 62. Unique Paths ├── 629. K Inverse Pairs Array ├── 659. Split Array into Consecutive Subsequences ├── 695. Max Area of Island ├── 729. My Calendar I ├── 731. My Calendar II ├── 746. Min Cost Climbing Stairs ├── 792. Number of Matching Subsequences ├── 804. Unique Morse Code Words ├── 823. Binary Trees With Factors ├── 858. Mirror Reflection ├── 86. Partition List ├── 871. Minimum Number of Refueling Stops ├── 890. Find and Replace Pattern ├── 916. Word Subsets ├── 92. Reversed linked list II ├── 936. Stamping The Sequence ├── 97. Interleaving String ├── 98. Validate Binary Search Tree ├── Binary tree cameras- 968 ├── Fair distribution of cookies- 2305 ├── Longest palindromic substring- 5 └── Longest string chain- 1048 ├── LinkedList Pointer └── 109. Convert Sorted List to Binary Search Tree ├── Map utmost manipulation ├── *Iterating with main iterator- 962D ├── Delete 2 elements- 1598C ├── Deleting when frequency reaches 0 - Leetcode- 2007 ├── Direct search vs map.find()- 1702F ├── Iterating into map ├── Jeff and periods - 352B ├── Map and set- 129B ├── Map pair( New year- 1091B) ├── Pleasant pairs- 1541B └── Sail- Map, Vec & Set ├── Meet in the middle └── 2035. Partition Array Into Two Arrays to Minimize Sum Difference ├── Mod division ├── $** Modular Inverse ├── **Edgy trees- 1139C ├── **NcR mod ├── 2514. Count Anagrams ├── Cyclic permutation- 1391C ├── Juzzhu and sequences- 450B └── Two arrays- 1288C ├── Multiset- Set ├── (Deleting while using pointer)- Knight tournament- 356A ├── (Pair) Neko's maze game- 1292A ├── (Single occurence deletion) - Digital logarithm- 1728C ├── ***Element<=k - Watch the Videos- 1765D ├── *Morning jogging- 1517B ├── 1279B Versa for Santa(deleting any occurence in Multiset) ├── Buying gifts - 1802D ├── Make them odd- 1277C ├── Multiset+ lower_bound- (Box fitting- 1498B) ├── Productive meeting- 1579D ├── Set+ map- Merge Equals- 962D ├── Set> └── set> can be sorted using comparator ├── Policy Base ordered Set(Gives Index) ├── *Without using policy based multiset getting ele<= k - Watch the Videos-1765D ├── 1823. Find the Winner of the Circular Game ├── 295. Find Median from Data Stream ├── 352. Data Stream as Disjoint Intervals ├── 380. Insert Delete GetRandom O(1) ├── 981. Time Based Key-Value Store ├── Detail ├── Erase - 2653. Sliding Subarray Beauty ├── Multiset- leetcode 315. Count of Smaller Numbers After Self ├── Rook defenders- 1679C └── find_by_order vs order_of_key ├── Precision ├── Fixing precision to 2 digits └── Using long double ├── Prime Factorization ├── **Count GCD- 1750D ├── Factorial and Multiple- abc280D └── Sieve of eratosthenes, Naive O(sqrt(n)) this is O(logn) - Lucky Chains 1766D ├── Priority Queues ├── (Min) Phoenix and tower- 1515C ├── 1793. Maximum Score of a Good Subarray ├── 373. Find K Pairs with Smallest Sums ├── 502. IPO ├── 973. K Closest Points to Origin (Leetcode) ├── Custom sorting ├── Ehab and prefix MEX- 1364C ├── Epic transformation- 1506D ├── Incinerate - 1763B ├── Leetcode- Jump game vi ├── Min Heap - 1383. Maximum Performance of a Team (Leetcode) └── Potions- 1526C2 ├── README.md ├── Rabin karp ├── $* (Hash of concatenated string) - ABCBAC abc284F ├── $*** Efficient way to hash - Description Solution Discuss (999+) Submissions 718. Maximum Length of Repeated Subarray ├── (Right way to check) - 2472. Maximum Number of Non-overlapping Palindrome Substrings ├── 1044. Longest Duplicate Substring ├── 214. Shortest Palindrome ├── 28. Find the Index of the First Occurrence in a String ├── 3455. Shortest Matching Substring ├── 718. Maximum Length of Repeated Subarray ├── General Template ├── Karuta- abc289E └── Maximum Deletions on a String - Leetcode 2430 ├── Recursion ├── *N-queens ├── A-good string- 1385D └── Permutation Transformation- 1490D ├── Segment tree ├── ** min and max, also using same struct - Permutation Distance- abc283 ├── 22673. Make Costs of Paths Equal in a Binary Tree ├── 2940. Find Building Where Alice and Bob Can Meet ├── Dora and Search - 1793C ├── Max + Update- Leetcode - LIS 2 - 2407 ├── Max - Maximum Number of Robots Within Budget - 2398 ├── Min + Update - 2462. Total Cost to Hire K Workers ├── Rorororobot- 1709D- (max) ├── Segment tree └── Update the sum query- Leetcode-307 ├── Sliding Window └── Nashtya and door- 1341B ├── Spanning tree ├── (MST, Prims, Krushkal's) Railyway System- 1687B ├── 1584. Min Cost to Connect All Points └── Kruskal's MST ├── Stack ├── 2818. Apply Operations to Maximize Score └── Next Greater Element- Distinct Values- DIST_VALS ├── Strings Deep manipulation ├── Fair distribution of cookies- 2305 └── Shower Line(All permutations) ├── Template.cpp ├── Time Complexity └── Candies - CANDIES3 (n+ nby2 + nby3) ├── Topological Sort ├── 1203. Sort Items by Groups Respecting Dependencies └── 2050. Parallel Courses III ├── Tree ├── $**Diameter of the tree ├── ** Finding parent in a tree- 2646. Minimize the Total Price of the Trips ├── **623. Add One Row to Tree ├── **Counting childs as well as shortest path- 1336A ├── **Counting childs- leetcode 2265 ├── 108. Convert Sorted Array to Binary Search Tree ├── 2458. Height of Binary Tree After Subtree Removal Queries └── Layers (1593E) ├── Trie ├── 208. Implement Trie ├── 211. Design Add and Search Words Data Structure ├── 3093. Longest Common Suffix Queries ├── 3291. Minimum Number of Valid Strings to Form Target I └── When to Use ├── Two Pointers ├── Alice, Bob and chocolate- 6C ├── Backspace- 1553D ├── Brutality- 1107C ├── Lecture sleep- 961B ├── Most socially distanced subsequence-1364B ├── Pair of topics- 1324D ├── Pair programming ├── Strange birthday party- 1470A └── XXX- 1364A ├── Vector Pair manual sorting ├── (Triplet manual sorting) Hierarchy- 17B ├── Big segment- 242B ├── Leetcode custom sorting- 953. Verifying an Alien Dictionary ├── Vector map └── text.cpp ├── monotonic stack └── Boris and His Amazing Haircut- 1779D └── nCr ├── 2514. Count Anagrams ├── Card Game- 1739C └── Fermat - 1569. 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