├── .gitignore
├── CPPNotes.md
├── LICENSE
├── README.md
├── SQL
    ├── 175. Combine Two Tables.cpp
    └── 175. Combine Two Tables.txt
├── algorithms
    ├── graph
    │   ├── bellmanFord_algorithm.cpp
    │   ├── dijkstras_algorithm.cpp
    │   ├── floyd_warshall_algorithm.cpp
    │   ├── kosarajus_algorithm.cpp
    │   ├── kruskals_mst_algorithm.cpp
    │   ├── prims_mst_algorithm.cpp
    │   └── topological_sorting_dfs.cpp
    ├── searching
    │   ├── binary_search.cpp
    │   ├── exponential_search.cpp
    │   ├── interpolation_search.cpp
    │   ├── jump_search.cpp
    │   └── linear_search.cpp
    └── sorting
    │   ├── merge_sort.cpp
    │   ├── quick_select.cpp
    │   └── quick_sort.cpp
├── array
    ├── array_pair_sum.cpp
    ├── array_product_except_ith_element.cpp
    ├── binary_search.cpp
    ├── connect_ropes_with_min_cost.cpp
    ├── count_of_element_binary_search.cpp
    ├── distinct_element_in_window_of_size_k.cpp
    ├── first_and_last_occurence_of_element_binary_search.cpp
    ├── floor_of_num_in_sorted_array_binary_search.cpp
    ├── generate_all_subarrays.cpp
    ├── inversion_count_merge_sort.cpp
    ├── juggling_rotation.cpp
    ├── k_closest_num_max_heap.cpp
    ├── k_closest_points_to_origin.cpp
    ├── k_largest_num_min_heap.cpp
    ├── kadanes_algorithm.cpp
    ├── kth_smallest_num_max_heap.cpp
    ├── largest_subarray_with_sum_0.cpp
    ├── longest_non_decreasing_subsequence.cpp
    ├── max_hamming_distance.cpp
    ├── merge_intervals.cpp
    ├── merge_two_sorted_array_O(1)_space.cpp
    ├── missing_and_repeating_number.cpp
    ├── num_of_rotation_in_sorted_array_binary_search.cpp
    ├── quick_left_rotate.cpp
    ├── rotated_max_i_multiply_ai.cpp
    ├── rotated_pivot_point.cpp
    ├── rotated_search.cpp
    ├── set_matrix_ones_in_O(1).cpp
    ├── sort_k_sorted_array.cpp
    ├── sorted_rotated_min_search.cpp
    ├── sorted_rotated_sum_pair_search.cpp
    ├── sum_of_elements_between_k1_k2_th_smallest.cpp
    ├── three_sum_problem.cpp
    ├── top_k_frequent_nums_min_heap.cpp
    └── trapping_rain_water.cpp
├── backtracking
    ├── graph_coloring.cpp
    ├── knight_tour.cpp
    ├── n_queen_columnwise.cpp
    ├── n_queen_rowwise.cpp
    ├── palindromic_partioning.cpp
    ├── rat_in_a_maze.cpp
    └── sudoku.cpp
├── bit magic
    └── Max_Character_Distinct_Words.cpp
├── competitive programming
    ├── codechef
    │   ├── ADAMAT.cpp
    │   ├── CHEFWARS.cpp
    │   ├── CHFICRM.cpp
    │   ├── COPR16G.cpp
    │   ├── CRDGAME3.cpp
    │   ├── EOEO.cpp
    │   ├── EVENM.cpp
    │   ├── GCDQ.cpp
    │   ├── LINCHESS.cpp
    │   ├── PRB01.cpp
    │   ├── PRICECON.cpp
    │   ├── README.MD
    │   ├── TREE2.cpp
    │   ├── XYSTR.cpp
    │   ├── chefstlt.cpp
    │   ├── diffsum.cpp
    │   ├── flow014.cpp
    │   ├── ppsum.cpp
    │   └── twtclose.cpp
    ├── codeforces
    │   ├── 1055A - Metro.cpp
    │   ├── 1056A - Determine Line.cpp
    │   ├── 1075A - The King's Race.cpp
    │   ├── 10A - Power Consumption Calculation.cpp
    │   ├── 110A - Nearly Lucky Number.cpp
    │   ├── 1113A - Sasha and His Trip.cpp
    │   ├── 112A - Petya and Strings.cpp
    │   ├── 1141B - Maximal Continuous Rest.cpp
    │   ├── 1146A - Love A.cpp
    │   ├── 115A - Party.cpp
    │   ├── 1162A - Zoning Restrictions Again.cpp
    │   ├── 116A - Tram.cpp
    │   ├── 1180A - Alex and a Rhombus.cpp
    │   ├── 1182A - Filling Shapes.cpp
    │   ├── 1186A - Vus the Cossack and a Contest.cpp
    │   ├── 1220A - Cards.cpp
    │   ├── 1223A - CME.cpp
    │   ├── 122A - Lucky Division.cpp
    │   ├── 1238A - Prime Subtraction.cpp
    │   ├── 1250F - Data Center.cpp
    │   ├── 1260B - Make Product Equal One.cpp
    │   ├── 1272A - Three Friends.cpp
    │   ├── 1281A - Suffix Three.cpp
    │   ├── 1283B - Candies Division.cpp
    │   ├── 1284A - New Year and Naming.cpp
    │   ├── 1295A - Display The Number.cpp
    │   ├── 1296B - Food Buying.cpp
    │   ├── 12A - Super Agent.cpp
    │   ├── 131A - cAPS lOCK.cpp
    │   ├── 1323A - Even Subset Sum Problem.cpp
    │   ├── 1324A - Yet Another Tetris Problem.cpp
    │   ├── 1326B - Maximums.cpp
    │   ├── 1328A - Divisibility Problem.cpp
    │   ├── 1330A - Dreamoon and Ranking Collection.cpp
    │   ├── 1335A - Candies and Two Sisters.cpp
    │   ├── 1335B - Construct the String.cpp
    │   ├── 1337B - Kana and Dragon Quest game.cpp
    │   ├── 1339A - Filling Diamonds.cpp
    │   ├── 133A - HQ9+.cpp
    │   ├── 1341A - Nastya and Rice.cpp
    │   ├── 1343A - Candies.cpp
    │   ├── 1343B - Balanced Array.cpp
    │   ├── 1348A - Phoenix and Balance.cpp
    │   ├── 1350A - Orac and Factors.cpp
    │   ├── 1350C - Orac and LCM.cpp
    │   ├── 1352A - Sum of Round Numbers.cpp
    │   ├── 1353A - Most Unstable Array.cpp
    │   ├── 1353B - Two Arrays And Swaps.cpp
    │   ├── 1354A - Alarm Clock.cpp
    │   ├── 1359B - New Theatre Square.cpp
    │   ├── 1360A - Minimal Square.cpp
    │   ├── 1360B - Honest Coach.cpp
    │   ├── 1367A - Short Substrings.cpp
    │   ├── 1367B - Even Array.cpp
    │   ├── 136A - Presents.cpp
    │   ├── 1370A - Maximum GCD.cpp
    │   ├── 1371A - Magical Sticks.cpp
    │   ├── 1373B - 01 Game.cpp
    │   ├── 1374A - Required Remainder.cpp
    │   ├── 1374B - Multiply by 2, divide by 6.cpp
    │   ├── 1380A - Three Indices.cpp
    │   ├── 1385B - Restore the Permutation by Merger.cpp
    │   ├── 1399B - Gifts Fixing.cpp
    │   ├── 1406A - Subset Mex.cpp
    │   ├── 1409A - Yet Another Two Integers Problem.cpp
    │   ├── 1419A - Digit Game.cpp
    │   ├── 141A - Amusing Joke.cpp
    │   ├── 1420A - Cubes Sorting.cpp
    │   ├── 1426B - Symmetric Matrix.cpp
    │   ├── 1430A - Number of Apartments.cpp
    │   ├── 1433C - Dominant Piranha.cpp
    │   ├── 1436B - Prime Square.cpp
    │   ├── 1440A -Buy the String.cpp
    │   ├── 1440B - Sum of Medians.cpp
    │   ├── 144A - Arrival of the General.cpp
    │   ├── 1450A - Avoid Trygub.cpp
    │   ├── 1451B - Non-Substring Subsequence.cpp
    │   ├── 1452A - Robot Program.cpp
    │   ├── 1452C - Two Brackets.cpp
    │   ├── 1461A - String Generation.cpp
    │   ├── 1462B - Last Year's Substring.cpp
    │   ├── 1462C - Unique Number.cpp
    │   ├── 1465A - In-game Chat.cpp
    │   ├── 1465B - Fair Numbers.cpp
    │   ├── 1466A - Bovine Dilemma.cpp
    │   ├── 1466B - Last minute enhancements.cpp
    │   ├── 1467A - Wizard of Orz.cpp
    │   ├── 1467B - Hills And Valleys.cpp
    │   ├── 1469B - Red and Blue.cpp
    │   ├── 1472B - Fair Division.cpp
    │   ├── 1473A - Replacing Elements.cpp
    │   ├── 1473B - String LCM.cpp
    │   ├── 1474A - Puzzle From the Future.cpp
    │   ├── 1475A - Odd Divisor.cpp
    │   ├── 1475B - New Year's Number.cpp
    │   ├── 1486A - Shifting Stacks.cpp
    │   ├── 148A - Insomnia cure.cpp
    │   ├── 1490A - Dense Array.cpp
    │   ├── 1490B - Balanced Remainders.cpp
    │   ├── 1494A - ABC String.cpp
    │   ├── 1499B - Binary Removals.cpp
    │   ├── 149A - Business trip.cpp
    │   ├── 14A - Letter.cpp
    │   ├── 1501B - Napoleon Cake.cpp
    │   ├── 1515A - Phoenix and Gold.cpp
    │   ├── 1515B - Phoenix and Puzzle.cpp
    │   ├── 1519A - Red and Blue Beans.cpp
    │   ├── 1519B - The Cake Is a Lie.cpp
    │   ├── 151A - Soft Drinking.cpp
    │   ├── 1520A - Do Not Be Distracted.cpp
    │   ├── 1520B - Ordinary Numbers.cpp
    │   ├── 1520C - Not Adjacent Matrix.cpp
    │   ├── 1520D - Same Differences.cpp
    │   ├── 1521A - Nastia and Nearly Good Numbers.cpp
    │   ├── 1521B - Nastia and a Good Array.cpp
    │   ├── 1523A - Game of Life.cpp
    │   ├── 1523B - Lord of the Values.cpp
    │   ├── 1525A - Potion-making.cpp
    │   ├── 1525B - Permutation Sort.cpp
    │   ├── 1526A - Mean Inequality.cpp
    │   ├── 1526B - I Hate 1111.cpp
    │   ├── 1527A - And Then There Were K.cpp
    │   ├── 1527B1 - Palindrome Game (easy version).cpp
    │   ├── 1529A - Eshag Loves Big Arrays.cpp
    │   ├── 1530A - Binary Decimal.cpp
    │   ├── 1530B - Putting Plates.cpp
    │   ├── 1535A - Fair Playoff.cpp
    │   ├── 1535B - Array Reodering.cpp
    │   ├── 1536A - Omkar and Bad Story.cpp
    │   ├── 1536B - Prinzessin der Verurteilung.cpp
    │   ├── 1536C - Diluc and Kaeya.cpp
    │   ├── 1537A - Arithmetic Array.cpp
    │   ├── 1537B - Bad Boy.cpp
    │   ├── 1538A - Stone Game.cpp
    │   ├── 1538B - Friends and Candies.cpp
    │   ├── 1539A - A. Contest Start.cpp
    │   ├── 1539B - Love Song.cpp
    │   ├── 1539C - Stable Groups.cpp
    │   ├── 1541A - Pretty Permutations.cpp
    │   ├── 1541B - Pleasant Pairs.cpp
    │   ├── 1541C - Great Graphs.cpp
    │   ├── 1543A - Exciting Bets.cpp
    │   ├── 1543B - Customising the Track.cpp
    │   ├── 1555C - Coin Rows.cpp
    │   ├── 1557A - Ezzat and Two Subsequences.cpp
    │   ├── 1557B - Moamen and k-subarrays.cpp
    │   ├── 155A - I_love_username.cpp
    │   ├── 1560A - Dislike of Threes.cpp
    │   ├── 157A - Game Outcome.cpp
    │   ├── 158A - Next Round.cpp
    │   ├── 160A - Twins.cpp
    │   ├── 1626A - Equidistant Letters.cpp
    │   ├── 1626B - Minor Reduction.cpp
    │   ├── 1646A - Square Counting.cpp
    │   ├── 1654A - Maximum Cake Tastiness.cpp
    │   ├── 1654B - Prefix Removals.cpp
    │   ├── 1654C - Alice and the Cake.cpp
    │   ├── 1656A - Good Pairs.cpp
    │   ├── 1669A - Division.cpp
    │   ├── 1669B - Triple.cpp
    │   ├── 1669C - Odd-Even Increments.cpp
    │   ├── 1669D - Colorful Stamp.cpp
    │   ├── 169A - Chores.cpp
    │   ├── 172A - Phone Code.cpp
    │   ├── 177A1 - Good Matrix Elements.cpp
    │   ├── 177A2 - Good Matrix Elements.cpp
    │   ├── 181A - Series of Crimes.cpp
    │   ├── 189A - Cut Ribbon.cpp
    │   ├── 1A - Theatre Square.cpp
    │   ├── 200B - Drinks.cpp
    │   ├── 208A - Dubstep.cpp
    │   ├── 228A - Is your horseshoe on the other hoof.cpp
    │   ├── 230A - Dragons.cpp
    │   ├── 236A - Boy or Girl.cpp
    │   ├── 245A - System Administrator.cpp
    │   ├── 255A - Greg's Workout.cpp
    │   ├── 25A - IQ test.cpp
    │   ├── 263A - Beautiful Matrix.cpp
    │   ├── 266A - Stones on the Table.cpp
    │   ├── 266B - Queue at the School.cpp
    │   ├── 268A - Games.cpp
    │   ├── 271A - Beautiful Year.cpp
    │   ├── 272A - Dima and Friends.cpp
    │   ├── 276A - Lunch Rush.cpp
    │   ├── 281A - Word Capitalization.cpp
    │   ├── 291A - Spyke Talks.cpp
    │   ├── 302A - Eugeny and Array.cpp
    │   ├── 306A - Candies.cpp
    │   ├── 313A - Ilya and Bank Account.cpp
    │   ├── 313B - Ilya and Queries.cpp
    │   ├── 318A - Even Odds.cpp
    │   ├── 320A - Magic Numbers.cpp
    │   ├── 32B - Borze.cpp
    │   ├── 330A - Cakeminator.cpp
    │   ├── 337A - Puzzles.cpp
    │   ├── 339A - Helpful Maths.cpp
    │   ├── 344A - Magnets.cpp
    │   ├── 34B - Sale.cpp
    │   ├── 363B - Fence.cpp
    │   ├── 378A - Playing with Dice.cpp
    │   ├── 385A - Bear and Raspberry.cpp
    │   ├── 386A - Second-Price Auction.cpp
    │   ├── 405A - Gravity Flip.cpp
    │   ├── 411A - Password Check.cpp
    │   ├── 41A - Translation.cpp
    │   ├── 421A - Pasha and Hamsters.cpp
    │   ├── 427A - Police Recruits.cpp
    │   ├── 432A - Choosing Teams.cpp
    │   ├── 439A - Devu, the Singer and Churu, the Joker.cpp
    │   ├── 440A - Forgotten Episode.cpp
    │   ├── 441A - Valera and Antique Items.cpp
    │   ├── 443A - Anton and Letters.cpp
    │   ├── 451A - Game With Sticks.cpp
    │   ├── 456A - Laptops.cpp
    │   ├── 459A - Pashmak and Garden.cpp
    │   ├── 460A - Vasya and Socks.cpp
    │   ├── 462A - Appleman and Easy Task.cpp
    │   ├── 466A - Cheap Travel.cpp
    │   ├── 467A - George and Accommodation.cpp
    │   ├── 469A - I Wanna Be the Guy.cpp
    │   ├── 46A - Ball Game.cpp
    │   ├── 472A - Design Tutorial Learn from Math.cpp
    │   ├── 474A - Keyboard.cpp
    │   ├── 476A - Dreamoon and Stairs.cpp
    │   ├── 479A - Expression.cpp
    │   ├── 483A - Counterexample.cpp
    │   ├── 486A - Calculating Function.cpp
    │   ├── 490A - Team Olympiad.cpp
    │   ├── 496A - Minimum Difficulty.cpp
    │   ├── 509A - Maximum in Table.cpp
    │   ├── 50A - Domino piling.cpp
    │   ├── 510A - Fox And Snake.cpp
    │   ├── 519A - A and B and Chess.cpp
    │   ├── 520A - Pangram.cpp
    │   ├── 546A-  Soldier and Bananas.cpp
    │   ├── 556A - Case of the Zeros and Ones.cpp
    │   ├── 567A - Lineland Mail.cpp
    │   ├── 580A - Kefa and First Steps.cpp
    │   ├── 588A - Duff and Meat.cpp
    │   ├── 58A - Chat room.cpp
    │   ├── 598A - Tricky Sum.cpp
    │   ├── 59A - Word.cpp
    │   ├── 617A - Elephant.cpp
    │   ├── 61A - Ultra-Fast Mathematician.cpp
    │   ├── 658A - Bear and Reverse Radewoosh.cpp
    │   ├── 677A - Vanya and Fence.cpp
    │   ├── 69A - Young Physicist.cpp
    │   ├── 702A - Maximum Increase.cpp
    │   ├── 703A - Mishka and Game.cpp
    │   ├── 706B - Interesting drink.cpp
    │   ├── 709A - Juicer.cpp
    │   ├── 711A - Bus to Udayland.cpp
    │   ├── 723A - The New Year Meeting Friends.cpp
    │   ├── 732A - Buy a Shovel.cpp
    │   ├── 732B - Cormen — The Best Friend Of a Man.cpp
    │   ├── 734A - Anton and Danik.cpp
    │   ├── 742A - Arpa’s hard exam and Mehrdad’s naive cheat.cpp
    │   ├── 749A - Bachgold Problem.cpp
    │   ├── 750A - New Year and Hurry.cpp
    │   ├── 753A - Santa Claus and Candies.cpp
    │   ├── 755A - PolandBall and Hypothesis.cpp
    │   ├── 758A - Holiday Of Equality.cpp
    │   ├── 760A - Petr and a calenda.cpp
    │   ├── 760A - Petr and a calendar.cpp
    │   ├── 764B - Decoding.cpp
    │   ├── 768A - Oath of the Night's Watch.cpp
    │   ├── 769A - Year of University Entrance.cpp
    │   ├── 78A - Haiku.cpp
    │   ├── 794A - Bank Robbery.cpp
    │   ├── 802G -  Fake News (easy).cpp
    │   ├── 818A - Diplomas and Certificates.cpp
    │   ├── 859A - Declined Finalists.cpp
    │   ├── 867A - Between the Offices.cpp
    │   ├── 873A - Chores.cpp
    │   ├── 873A - Chores.exe
    │   ├── 894A - QAQ.cpp
    │   ├── 910A - The Way to Home.cpp
    │   ├── 935A - Fafa and his Company.cpp
    │   ├── 939A - Love Triangle.cpp
    │   ├── 948A - Protect Sheep.cpp
    │   ├── 959A - Mahmoud and Ehab and the even-odd game.cpp
    │   ├── 96A - Football.cpp
    │   ├── 977B - Two-gram.cpp
    │   ├── 996A - Hit the Lottery.cpp
    │   ├── 99A - Help Far Away Kingdom.cpp
    │   ├── README.MD
    │   └── _template.cpp
    ├── cses
    │   └── Introductory Problems
    │   │   ├── Increasing Array.cpp
    │   │   ├── Missing Number.cpp
    │   │   ├── Permutations.cpp
    │   │   ├── Repetitions.cpp
    │   │   ├── Two Sets.cpp
    │   │   └── Weird Algorithm.cpp
    ├── hackerearth
    │   ├── basic_number_theory_Can you Guess.cpp
    │   ├── basic_number_theory_Love Triangle.cpp
    │   ├── basic_number_theory_Mystery.cpp
    │   ├── math_number_theory_Micro and Prime Prime.cpp
    │   └── math_number_theory_Prime Interval.cpp
    ├── hackerrank
    │   └── math_number_theory_Fibonacci Finding (easy).cpp
    ├── interviewbit
    │   ├── arrays
    │   │   ├── Add One To Number.cpp
    │   │   ├── Max Sum Contiguous Subarray.cpp
    │   │   ├── Maximum Absolute Difference.cpp
    │   │   ├── Min Steps in Infinite Grid.cpp
    │   │   └── Spiral Order Matrix I.cpp
    │   └── math
    │   │   ├── All Factors.cpp
    │   │   ├── Binary Representation.cpp
    │   │   ├── Hamming Distance.cpp
    │   │   ├── MATH_BUG0.cpp
    │   │   ├── MATH_BUG02.cpp
    │   │   ├── Prime Numbers.cpp
    │   │   ├── Prime Sum.cpp
    │   │   └── Verify Prime.cpp
    └── leetcode
    │   ├── 1. Two Sum.cpp
    │   ├── 100. Same Tree.cpp
    │   ├── 1002. Find Common Characters.cpp
    │   ├── 1004. Max Consecutive Ones III.cpp
    │   ├── 1007. Minimum Domino Rotations For Equal Row.cpp
    │   ├── 1009. Complement of Base 10 Integer.cpp
    │   ├── 101. Symmetric Tree.cpp
    │   ├── 1010. Pairs of Songs With Total Durations Divisible by 60.cpp
    │   ├── 102. Binary Tree Level Order Traversal.cpp
    │   ├── 1020. Number of Enclaves.cpp
    │   ├── 1021. Remove Outermost Parentheses.cpp
    │   ├── 1022. Sum of Root To Leaf Binary Numbers.cpp
    │   ├── 1025. Divisor Game.cpp
    │   ├── 1029. Two City Scheduling.cpp
    │   ├── 103. Binary Tree Zigzag Level Order Traversal.cpp
    │   ├── 1032. Stream of Characters.cpp
    │   ├── 1037. Valid Boomerang.cpp
    │   ├── 104. Maximum Depth of Binary Tree.cpp
    │   ├── 1041. Robot Bounded In Circle.cpp
    │   ├── 1046. Last Stone Weight.cpp
    │   ├── 1047. Remove All Adjacent Duplicates In String.cpp
    │   ├── 105. Construct Binary Tree from Preorder and Inorder Traversal.cpp
    │   ├── 1051. Height Checker.cpp
    │   ├── 106. Construct Binary Tree from Inorder and Postorder Traversal.cpp
    │   ├── 107. Binary Tree Level Order Traversal II.cpp
    │   ├── 108. Convert Sorted Array to Binary Search Tree.cpp
    │   ├── 1091. Shortest Path in Binary Matrix.cpp
    │   ├── 1094. Car Pooling.cpp
    │   ├── 11. Container With Most Water.cpp
    │   ├── 110. Balanced Binary Tree.cpp
    │   ├── 1103. Distribute Candies to People.cpp
    │   ├── 1108. Defanging an IP Address.cpp
    │   ├── 1122. Relative Sort Array.cpp
    │   ├── 113. Path Sum II.cpp
    │   ├── 1137. N-th Tribonacci Number.cpp
    │   ├── 114. Flatten Binary Tree to Linked List.cpp
    │   ├── 1143. Longest Common Subsequence.cpp
    │   ├── 116. Populating Next Right Pointers in Each Node.cpp
    │   ├── 1160. Find Words That Can Be Formed by Characters.cpp
    │   ├── 117. Populating Next Right Pointers in Each Node II.cpp
    │   ├── 1170. Compare Strings by Frequency of the Smallest Character.cpp
    │   ├── 118. Pascal's Triangle.cpp
    │   ├── 1189. Maximum Number of Balloons.cpp
    │   ├── 119. Pascal's Triangle II.cpp
    │   ├── 1192. Critical Connections in a Network.cpp
    │   ├── 12. Integer to Roman.cpp
    │   ├── 1202. Smallest String With Swaps.cpp
    │   ├── 1209. Remove All Adjacent Duplicates in String II.cpp
    │   ├── 121. Best Time to Buy and Sell Stock.cpp
    │   ├── 122. Best Time to Buy and Sell Stock II.cpp
    │   ├── 1221. Split a String in Balanced Strings.cpp
    │   ├── 123. Best Time to Buy and Sell Stock III.cpp
    │   ├── 1232. Check If It Is a Straight Line.cpp
    │   ├── 124. Binary Tree Maximum Path Sum.cpp
    │   ├── 125. Valid Palindrome.cpp
    │   ├── 1252. Cells with Odd Values in a Matrix.cpp
    │   ├── 1266. Minimum Time Visiting All Points.cpp
    │   ├── 128. Longest Consecutive Sequence.cpp
    │   ├── 1286. Iterator for Combination.cpp
    │   ├── 1288. Remove Covered Intervals.cpp
    │   ├── 129. Sum Root to Leaf Numbers.cpp
    │   ├── 1290. Convert Binary Number in a Linked List to Integer.cpp
    │   ├── 1291. Sequential Digits.cpp
    │   ├── 1295. Find Numbers with Even Number of Digits.cpp
    │   ├── 1299. Replace Elements with Greatest Element on Right Side.cpp
    │   ├── 13. Roman to Integer.cpp
    │   ├── 130. Surrounded Regions.cpp
    │   ├── 1302. Deepest Leaves Sum.cpp
    │   ├── 1304. Find N Unique Integers Sum up to Zero.cpp
    │   ├── 1305. All Elements in Two Binary Search Trees.cpp
    │   ├── 1309. Decrypt String from Alphabet to Integer Mapping.cpp
    │   ├── 131. Palindrome Partitioning.cpp
    │   ├── 1313. Decompress Run-Length Encoded List.cpp
    │   ├── 132. Palindrome Partitioning II.cpp
    │   ├── 1323. Maximum 69 Number.cpp
    │   ├── 133. Clone Graph.cpp
    │   ├── 1332. Remove Palindromic Subsequences.cpp
    │   ├── 1337. The K Weakest Rows in a Matrix.cpp
    │   ├── 134. Gas Station.cpp
    │   ├── 1342. Number of Steps to Reduce a Number to Zero.cpp
    │   ├── 1344. Angle Between Hands of a Clock.cpp
    │   ├── 1347. Minimum Number of Steps to Make Two Strings Anagram.cpp
    │   ├── 135. Candy.cpp
    │   ├── 1351. Count Negative Numbers in a Sorted Matrix.cpp
    │   ├── 136. Single Number.cpp
    │   ├── 1365. How Many Numbers Are Smaller Than the Current Number.cpp
    │   ├── 137. Single Number II.cpp
    │   ├── 1370. Increasing Decreasing String.cpp
    │   ├── 1374. Generate a String With Characters That Have Odd Counts.cpp
    │   ├── 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree.cpp
    │   ├── 138. Copy List with Random Pointer.cpp
    │   ├── 1380. Lucky Numbers in a Matrix.cpp
    │   ├── 1385. Find the Distance Value Between Two Arrays.cpp
    │   ├── 1387. Sort Integers by The Power Value.cpp
    │   ├── 1389. Create Target Array in the Given Order.cpp
    │   ├── 139. Word Break.cpp
    │   ├── 1396. Design Underground System.cpp
    │   ├── 14. Longest Common Prefix.cpp
    │   ├── 1401A - Distance and Axis.cpp
    │   ├── 1408. String Matching in an Array.cpp
    │   ├── 141. Linked List Cycle.cpp
    │   ├── 142. Linked List Cycle II.cpp
    │   ├── 143. Reorder List.cpp
    │   ├── 1431. Kids With the Greatest Number of Candies.cpp
    │   ├── 1436. Destination City.cpp
    │   ├── 144. Binary Tree Preorder Traversal.cpp
    │   ├── 1441. Build an Array With Stack Operations.cpp
    │   ├── 1446. Consecutive Characters.cpp
    │   ├── 1448. Count Good Nodes in Binary Tree.cpp
    │   ├── 145. Binary Tree Postorder Traversal.cpp
    │   ├── 1450. Number of Students Doing Homework at a Given Time.cpp
    │   ├── 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence.cpp
    │   ├── 1456. Maximum Number of Vowels in a Substring of Given Length.cpp
    │   ├── 146. LRU Cache.cpp
    │   ├── 1460. Make Two Arrays Equal by Reversing Sub-arrays.cpp
    │   ├── 1464. Maximum Product of Two Elements in an Array.cpp
    │   ├── 147. Insertion Sort List.cpp
    │   ├── 1470. Shuffle the Array.cpp
    │   ├── 1475. Final Prices With a Special Discount in a Shop.cpp
    │   ├── 148. Sort List.cpp
    │   ├── 1480. Running Sum of 1d Array.cpp
    │   ├── 1486. XOR Operation in an Array.cpp
    │   ├── 1491. Average Salary Excluding the Minimum and Maximum Salary.cpp
    │   ├── 1492. The kth Factor of n.cpp
    │   ├── 1498. Number of Subsequences That Satisfy the Given Sum Condition.cpp
    │   ├── 15. 3Sum.cpp
    │   ├── 1502. Can Make Arithmetic Progression From Sequence.cpp
    │   ├── 1507. Reformat Date.cpp
    │   ├── 151. Reverse Words in a String.cpp
    │   ├── 1512. Number of Good Pairs.cpp
    │   ├── 152. Maximum Product Subarray.cpp
    │   ├── 1534. Count Good Triplets.cpp
    │   ├── 154. Find Minimum in Rotated Sorted Array II.cpp
    │   ├── 1544. Make The String Great.cpp
    │   ├── 1550. Three Consecutive Odds.cpp
    │   ├── 1551. Minimum Operations to Make Array Equal.cpp
    │   ├── 1553. Minimum Number of Days to Eat N Oranges.cpp
    │   ├── 1556. Thousand Separator.cpp
    │   ├── 1557. Minimum Number of Vertices to Reach All Nodes.cpp
    │   ├── 1560. Most Visited Sector in a Circular Track.cpp
    │   ├── 1572. Matrix Diagonal Sum.cpp
    │   ├── 1576. Replace All 's to Avoid Consecutive Repeating Characters.cpp
    │   ├── 1577. Number of Ways Where Square of Number Is Equal to Product of Two Numbers.cpp
    │   ├── 1578. Minimum Deletion Cost to Avoid Repeating Letters.cpp
    │   ├── 1582. Special Positions in a Binary Matrix.cpp
    │   ├── 1588. Sum of All Odd Length Subarrays.cpp
    │   ├── 1592. Rearrange Spaces Between Words.cpp
    │   ├── 1598. Crawler Log Folder.cpp
    │   ├── 160. Intersection of Two Linked Lists.cpp
    │   ├── 1603. Design Parking System.cpp
    │   ├── 1608. Special Array With X Elements Greater Than or Equal X.cpp
    │   ├── 1609. Even Odd Tree.cpp
    │   ├── 1614. Maximum Nesting Depth of the Parentheses.cpp
    │   ├── 1615. Maximal Network Rank.cpp
    │   ├── 1624. Largest Substring Between Two Equal Characters.cpp
    │   ├── 1629. Slowest Key.cpp
    │   ├── 1630. Arithmetic Subarrays.cpp
    │   ├── 1641. Count Sorted Vowel Strings.cpp
    │   ├── 165. Compare Version Numbers.cpp
    │   ├── 1656. Design an Ordered Stream.cpp
    │   ├── 1657. Determine if Two Strings Are Close.cpp
    │   ├── 1679. Max Number of K-Sum Pairs.cpp
    │   ├── 168. Excel Sheet Column Title.cpp
    │   ├── 169. Majority Element.cpp
    │   ├── 17. Letter Combinations of a Phone Number.cpp
    │   ├── 171. Excel Sheet Column Number.cpp
    │   ├── 1716. Calculate Money in Leetcode Bank.cpp
    │   ├── 172. Factorial Trailing Zeroes.cpp
    │   ├── 1721. Swapping Nodes in a Linked List.cpp
    │   ├── 173. Binary Search Tree Iterator.cpp
    │   ├── 174. Dungeon Game.cpp
    │   ├── 1768. Merge Strings Alternately.cpp
    │   ├── 179. Largest Number.cpp
    │   ├── 1791. Find Center of Star Graph.cpp
    │   ├── 18. 4Sum.cpp
    │   ├── 1822. Sign of the Product of an Array.cpp
    │   ├── 1854. Maximum Population Year.cpp
    │   ├── 1855. Maximum Distance Between a Pair of Values.cpp
    │   ├── 1863. Sum of All Subset XOR Totals.cpp
    │   ├── 1864. Minimum Number of Swaps to Make the Binary String Alternating.cpp
    │   ├── 1880. Check if Word Equals Summation of Two Words.cpp
    │   ├── 1881. Maximum Value after Insertion.cpp
    │   ├── 1884. Egg Drop With 2 Eggs and N Floors.cpp
    │   ├── 19. Remove Nth Node From End of List.cpp
    │   ├── 190. Reverse Bits.cpp
    │   ├── 191. Number of 1 Bits.cpp
    │   ├── 1913. Maximum Product Difference Between Two Pairs.cpp
    │   ├── 1914. Cyclically Rotating a Grid.cpp
    │   ├── 1964. Find the Longest Valid Obstacle Course at Each Position.cpp
    │   ├── 1971. Find if Path Exists in Graph.cpp
    │   ├── 198. House Robber.cpp
    │   ├── 2. Add Two Numbers.cpp
    │   ├── 200. Number of Islands.cpp
    │   ├── 2020-August-Challenge
    │       ├── Day-01-Detect Capital.cpp
    │       ├── Day-02-Design HashSet.cpp
    │       ├── Day-03-Valid Palindrome.cpp
    │       ├── Day-04-Power of Four.cpp
    │       ├── Day-05-Add and Search Word - Data structure design.cpp
    │       ├── Day-06-Find All Duplicates in an Array.cpp
    │       ├── Day-07-Vertical Order Traversal of a Binary Tree.cpp
    │       ├── Day-09-Rotting Oranges.cpp
    │       ├── Day-10-Excel Sheet Column Number.cpp
    │       ├── Day-11-H-Index.cpp
    │       ├── Day-12-Pascal's Triangle II.cpp
    │       ├── Day-13-Iterator for Combination.cpp
    │       ├── Day-14-Longest Palindrome.cpp
    │       ├── Day-15-Non-overlapping Intervals.cpp
    │       ├── Day-16-Best Time to Buy and Sell Stock III.cpp
    │       ├── Day-17-Distribute Candies to People.cpp
    │       ├── Day-18-Numbers With Same Consecutive Differences.cpp
    │       ├── Day-19-Goat Latin.cpp
    │       ├── Day-20-Reorder List.cpp
    │       ├── Day-22-Sort Array By Parity.cpp
    │       ├── Day-23-Stream of Characters.cpp
    │       ├── Day-24-Sum of Left Leaves.cpp
    │       ├── Day-25-Minimum Cost For Tickets.cpp
    │       ├── Day-26-Fizz Buzz.cpp
    │       ├── Day-27-Find Right Interval.cpp
    │       ├── Day-28-Implement Rand10() Using Rand7().cpp
    │       └── Day-30-Largest Component Size by Common Factor.cpp
    │   ├── 2020-December-Challenge
    │       ├── Day-01-Maximum Depth of Binary Tree.cpp
    │       ├── Day-02-Linked List Random Node.cpp
    │       ├── Day-03-Increasing Order Search Tree.cpp
    │       ├── Day-04-The kth Factor of n.cpp
    │       ├── Day-05-Can Place Flowers.cpp
    │       ├── Day-07-Spiral Matrix II.cpp
    │       ├── Day-08-Pairs of Songs With Total Durations Divisible by 60.cpp
    │       ├── Day-09-Binary Search Tree Iterator.cpp
    │       ├── Day-10-Valid Mountain Array.cpp
    │       ├── Day-11-Remove Duplicates from Sorted Array II.cpp
    │       ├── Day-12-Smallest Subtree with all the Deepest Nodes.cpp
    │       ├── Day-15-Squares of a Sorted Array.cpp
    │       ├── Day-16-Validate Binary Search Tree.cpp
    │       ├── Day-17-4Sum II.cpp
    │       └── Day-22-Balanced Binary Tree.cpp
    │   ├── 2020-July-Challenge
    │       ├── Day-01-Arranging Coins.cpp
    │       ├── Day-02-Binary Tree Level Order Traversal II.cpp
    │       ├── Day-03-Prison Cells After N Days.cpp
    │       ├── Day-04-Ugly Number II.cpp
    │       ├── Day-05-Hamming Distance.cpp
    │       ├── Day-06-Plus One.cpp
    │       ├── Day-07-Island Perimeter.cpp
    │       ├── Day-08-3Sum.cpp
    │       ├── Day-09-Maximum Width of Binary Tree.cpp
    │       ├── Day-10-Flatten a Multilevel Doubly Linked List.cpp
    │       ├── Day-11-Subsets.cpp
    │       ├── Day-12-Reverse Bits.cpp
    │       ├── Day-13-Same Tree.cpp
    │       ├── Day-14-Angle Between Hands of a Clock.cpp
    │       ├── Day-15-Reverse Words in a String.cpp
    │       ├── Day-16-Pow(x, n).cpp
    │       ├── Day-17-Top K Frequent Elements.cpp
    │       ├── Day-18-Course Schedule II.cpp
    │       ├── Day-19-Add Binary.cpp
    │       ├── Day-20-Remove Linked List Elements.cpp
    │       ├── Day-21-Word Search.cpp
    │       ├── Day-22-Binary Tree Zigzag Level Order Traversal.cpp
    │       ├── Day-23-Single Number III.cpp
    │       ├── Day-24-All Paths From Source to Target.cpp
    │       ├── Day-25-Find Minimum in Rotated Sorted Array II.cpp
    │       ├── Day-26-Add Digits.cpp
    │       ├── Day-27-Construct Binary Tree from Inorder and Postorder Traversal.cpp
    │       ├── Day-28-Task Scheduler.cpp
    │       ├── Day-29-Best Time to Buy and Sell Stock with Cooldown.cpp
    │       ├── Day-30-Word Break II.cpp
    │       └── Day-31-Climbing Stairs.cpp
    │   ├── 2020-June-Challenge
    │       ├── Day-01-Invert Binary Tree.cpp
    │       ├── Day-02-Delete Node in a Linked List.cpp
    │       ├── Day-03-Two City Scheduling.cpp
    │       ├── Day-04-Reverse String.cpp
    │       ├── Day-05-Random Pick with Weight.cpp
    │       ├── Day-06-Queue Reconstruction by Height.cpp
    │       ├── Day-07-Coin Change 2.cpp
    │       ├── Day-08-Power of Two.cpp
    │       ├── Day-09-Is Subsequence.cpp
    │       ├── Day-10-Search Insert Position.cpp
    │       ├── Day-11-Sort Colors.cpp
    │       ├── Day-12-Insert Delete GetRandom O(1).cpp
    │       ├── Day-13-Largest Divisible Subset.cpp
    │       ├── Day-14-Cheapest Flights Within K Stops.cpp
    │       ├── Day-15-Search in a Binary Search Tree.cpp
    │       ├── Day-16-Validate IP Address.cpp
    │       ├── Day-17-Surrounded Regions.cpp
    │       ├── Day-18-H-Index II.cpp
    │       ├── Day-19-Longest Duplicate Substring.cpp
    │       ├── Day-20-Permutation Sequence.cpp
    │       ├── Day-21-Dungeon Game.cpp
    │       ├── Day-22-Single Number II.cpp
    │       ├── Day-23-Count Complete Tree Nodes.cpp
    │       ├── Day-24-Unique Binary Search Trees.cpp
    │       ├── Day-25-Find the Duplicate Number.cpp
    │       ├── Day-26-Sum Root to Leaf Numbers.cpp
    │       ├── Day-27-Perfect Squares.cpp
    │       ├── Day-28-Reconstruct Itinerary.cpp
    │       ├── Day-29-Unique Paths.cpp
    │       └── Day-30-Word Search II.cpp
    │   ├── 2020-November-Challenge
    │       ├── Day-01-Convert Binary Number in a Linked List to Integer.cpp
    │       ├── Day-02-Insertion Sort List.cpp
    │       ├── Day-03-Consecutive Characters.cpp
    │       ├── Day-11-Flipping an Image.cpp
    │       └── Day-11-Valid Square.cpp
    │   ├── 2020-October-Challenge
    │       ├── Day-01-Number of Recent Calls.cpp
    │       ├── Day-02-Combination Sum.cpp
    │       ├── Day-03-K-diff Pairs in an Array.cpp
    │       ├── Day-04-Remove Covered Intervals.cpp
    │       ├── Day-05-Complement of Base 10 Integer.cpp
    │       ├── Day-06-Insert into a Binary Search Tree.cpp
    │       ├── Day-07-Rotate List.cpp
    │       ├── Day-08-Binary Search.cpp
    │       ├── Day-09-Serialize and Deserialize BST.cpp
    │       ├── Day-10-Minimum Number of Arrows to Burst Balloons.cpp
    │       ├── Day-11-Remove Duplicate Letters.cpp
    │       ├── Day-12-Buddy Strings.cpp
    │       ├── Day-13-Sort List.cpp
    │       └── Day-14-House Robber II.cpp
    │   ├── 2020-September-Challenge
    │       ├── Day-01-Largest Time for Given Digits.cpp
    │       ├── Day-02-Contains Duplicate III.cpp
    │       ├── Day-03-Repeated Substring Pattern.cpp
    │       ├── Day-05-All Elements in Two Binary Search Trees.cpp
    │       ├── Day-07-Word Pattern.cpp
    │       ├── Day-08-Sum of Root To Leaf Binary Numbers.cpp
    │       ├── Day-09-Compare Version Numbers.cpp
    │       ├── Day-10-Bulls and Cows.cpp
    │       ├── Day-11-Maximum Product Subarray.cpp
    │       ├── Day-12-Combination Sum III.cpp
    │       ├── Day-14-House Robber.cpp
    │       ├── Day-15-Length of Last Word.cpp
    │       ├── Day-17-Robot Bounded In Circle.cpp
    │       ├── Day-18-Best Time to Buy and Sell Stock.cpp
    │       ├── Day-19-Sequential Digits.cpp
    │       ├── Day-21-Car Pooling.cpp
    │       ├── Day-22-Majority Element II.cpp
    │       ├── Day-23-Gas Station.cpp
    │       ├── Day-24-Find the Difference.cpp
    │       ├── Day-25-Largest Number.cpp
    │       └── Day-26-Teemo Attacking.cpp
    │   ├── 2021-June-Challenge
    │       └── Day-01-Max Area of Island.cpp
    │   ├── 203. Remove Linked List Elements.cpp
    │   ├── 204. Count Primes.cpp
    │   ├── 205. Isomorphic Strings.cpp
    │   ├── 206. Reverse Linked List.cpp
    │   ├── 207. Course Schedule.cpp
    │   ├── 209. Minimum Size Subarray Sum.cpp
    │   ├── 21. Merge Two Sorted Lists.cpp
    │   ├── 210. Course Schedule II.cpp
    │   ├── 211. Add and Search Word - Data structure design.cpp
    │   ├── 212. Word Search II.cpp
    │   ├── 213. House Robber II.cpp
    │   ├── 2130. Maximum Twin Sum of a Linked List.cpp
    │   ├── 215. Kth Largest Element in an Array.cpp
    │   ├── 216. Combination Sum III.cpp
    │   ├── 220. Contains Duplicate III.cpp
    │   ├── 221. Maximal Square.cpp
    │   ├── 2215. Find the Difference of Two Arrays.cpp
    │   ├── 222. Count Complete Tree Nodes.cpp
    │   ├── 225. Implement Stack using Queues.cpp
    │   ├── 226. Invert Binary Tree.cpp
    │   ├── 229. Majority Element II.cpp
    │   ├── 230. Kth Smallest Element in a BST.cpp
    │   ├── 231. Power of Two.cpp
    │   ├── 234. Palindrome Linked List.cpp
    │   ├── 235. Lowest Common Ancestor of a Binary Search Tree.cpp
    │   ├── 236. Lowest Common Ancestor of a Binary Tree.cpp
    │   ├── 237. Delete Node in a Linked List.cpp
    │   ├── 2389. Longest Subsequence With Limited Sum.cpp
    │   ├── 239. Sliding Window Maximum.cpp
    │   ├── 24. Swap Nodes in Pairs.cpp
    │   ├── 242. Valid Anagram.cpp
    │   ├── 2487. Remove Nodes From Linked List.cpp
    │   ├── 25. Reverse Nodes in k-Group.cpp
    │   ├── 2500. Delete Greatest Value in Each Row.cpp
    │   ├── 258. Add Digits.cpp
    │   ├── 26. Remove Duplicates from Sorted Array.cpp
    │   ├── 260. Single Number III.cpp
    │   ├── 264. Ugly Number II.cpp
    │   ├── 2643. Row With Maximum Ones.cpp
    │   ├── 2644. Find the Maximum Divisibility Score.cpp
    │   ├── 2645. Minimum Additions to Make Valid String.cpp
    │   ├── 268. Missing Number.cpp
    │   ├── 274. H-Index.cpp
    │   ├── 275. H-Index II.cpp
    │   ├── 279. Perfect Squares.cpp
    │   ├── 28. Implement strStr().cpp
    │   ├── 283. Move Zeroes.cpp
    │   ├── 284. Peeking Iterator.cpp
    │   ├── 287. Find the Duplicate Number.cpp
    │   ├── 29. Divide Two Integers.cpp
    │   ├── 290. Word Pattern.cpp
    │   ├── 295. Find Median from Data Stream.cpp
    │   ├── 297. Serialize and Deserialize Binary Tree.cpp
    │   ├── 299. Bulls and Cows.cpp
    │   ├── 3. Longest Substring Without Repeating Characters.cpp
    │   ├── 300. Longest Increasing Subsequence.cpp
    │   ├── 303. Range Sum Query - Immutable.cpp
    │   ├── 309. Best Time to Buy and Sell Stock with Cooldown.cpp
    │   ├── 31. Next Permutation.cpp
    │   ├── 316. Remove Duplicate Letters.cpp
    │   ├── 319. Bulb Switcher.cpp
    │   ├── 322. Coin Change.cpp
    │   ├── 326. Power of Three.cpp
    │   ├── 328. Odd Even Linked List.cpp
    │   ├── 329. Longest Increasing Path in a Matrix.cpp
    │   ├── 33. Search in Rotated Sorted Array.cpp
    │   ├── 332. Reconstruct Itinerary.cpp
    │   ├── 338. Counting Bits.cpp
    │   ├── 34. Find First and Last Position of Element in Sorted Array.cpp
    │   ├── 341. Flatten Nested List Iterator.cpp
    │   ├── 342. Power of Four.cpp
    │   ├── 344. Reverse String.cpp
    │   ├── 347. Top K Frequent Elements.cpp
    │   ├── 35. Search Insert Position.cpp
    │   ├── 36. Valid Sudoku.cpp
    │   ├── 367. Valid Perfect Square.cpp
    │   ├── 368. Largest Divisible Subset.cpp
    │   ├── 38. Count and Say.cpp
    │   ├── 380. Insert Delete GetRandom O(1).cpp
    │   ├── 382. Linked List Random Node.cpp
    │   ├── 389. Find the Difference.cpp
    │   ├── 39. Combination Sum.cpp
    │   ├── 392. Is Subsequence.cpp
    │   ├── 399. Evaluate Division.cpp
    │   ├── 40. Combination Sum II.cpp
    │   ├── 404. Sum of Left Leaves.cpp
    │   ├── 406. Queue Reconstruction by Height.cpp
    │   ├── 409. Longest Palindrome.cpp
    │   ├── 412. Fizz Buzz.cpp
    │   ├── 415. Add Strings.cpp
    │   ├── 416. Partition Equal Subset Sum.cpp
    │   ├── 42. Trapping Rain Water.cpp
    │   ├── 424. Longest Repeating Character Replacement.cpp
    │   ├── 429. N-ary Tree Level Order Traversal.cpp
    │   ├── 43. Multiply Strings.cpp
    │   ├── 430. Flatten a Multilevel Doubly Linked List.cpp
    │   ├── 435. Non-overlapping Intervals.cpp
    │   ├── 436. Find Right Interval.cpp
    │   ├── 438. Find All Anagrams in a String.cpp
    │   ├── 441. Arranging Coins.cpp
    │   ├── 442. Find All Duplicates in an Array.cpp
    │   ├── 443. String Compression.cpp
    │   ├── 445. Add Two Numbers II.cpp
    │   ├── 448. Find All Numbers Disappeared in an Array.cpp
    │   ├── 449. Serialize and Deserialize BST.cpp
    │   ├── 452. Minimum Number of Arrows to Burst Balloons.cpp
    │   ├── 454. 4Sum II.cpp
    │   ├── 456. 132 Pattern.cpp
    │   ├── 459. Repeated Substring Pattern.cpp
    │   ├── 46. Permutations.cpp
    │   ├── 461. Hamming Distance.cpp
    │   ├── 463. Island Perimeter.cpp
    │   ├── 468. Validate IP Address.cpp
    │   ├── 47. Permutations II.cpp
    │   ├── 470. Implement Rand10() Using Rand7().cpp
    │   ├── 476. Number Complement.cpp
    │   ├── 477. Total Hamming Distance.cpp
    │   ├── 48. Rotate Image.cpp
    │   ├── 485. Max Consecutive Ones.cpp
    │   ├── 49. Group Anagrams.cpp
    │   ├── 495. Teemo Attacking.cpp
    │   ├── 496. Next Greater Element I.cpp
    │   ├── 5. Longest Palindromic Substring.cpp
    │   ├── 50. Pow(x, n).cpp
    │   ├── 507. Perfect Number.cpp
    │   ├── 509. Fibonacci Number.cpp
    │   ├── 518. Coin Change 2.cpp
    │   ├── 520. Detect Capital.cpp
    │   ├── 528. Random Pick with Weight.cpp
    │   ├── 53. Maximum Subarray.cpp
    │   ├── 532. K-diff Pairs in an Array.cpp
    │   ├── 535. Encode and Decode TinyURL.cpp
    │   ├── 54. Spiral Matrix.cpp
    │   ├── 543. Diameter of Binary Tree.cpp
    │   ├── 547. Number of Provinces.cpp
    │   ├── 557. Reverse Words in a String III.cpp
    │   ├── 56. Merge Intervals.cpp
    │   ├── 560. Subarray Sum Equals K.cpp
    │   ├── 561. Array Partition I.cpp
    │   ├── 567. Permutation in String.cpp
    │   ├── 58. Length of Last Word.cpp
    │   ├── 581. Shortest Unsorted Continuous Subarray.cpp
    │   ├── 59. Spiral Matrix II.cpp
    │   ├── 593. Valid Square.cpp
    │   ├── 60. Permutation Sequence.cpp
    │   ├── 605. Can Place Flowers.cpp
    │   ├── 61. Rotate List.cpp
    │   ├── 62. Unique Paths.cpp
    │   ├── 621. Task Scheduler.cpp
    │   ├── 63. Unique Paths II.cpp
    │   ├── 633. Sum of Square Numbers.cpp
    │   ├── 64. Minimum Path Sum.cpp
    │   ├── 645. Set Mismatch.cpp
    │   ├── 649. Dota2 Senate.cpp
    │   ├── 653. Two Sum IV - Input is a BST.cpp
    │   ├── 657. Robot Return to Origin.cpp
    │   ├── 658. Find K Closest Elements.cpp
    │   ├── 66. Plus One.cpp
    │   ├── 662. Maximum Width of Binary Tree.cpp
    │   ├── 67. Add Binary.cpp
    │   ├── 671. Second Minimum Node In a Binary Tree.cpp
    │   ├── 682. Baseball Game.cpp
    │   ├── 684. Redundant Connection.cpp
    │   ├── 686. Repeated String Match.cpp
    │   ├── 69. Sqrt(x).cpp
    │   ├── 693. Binary Number with Alternating Bits.cpp
    │   ├── 695. Max Area of Island.cpp
    │   ├── 7. Reverse Integer.cpp
    │   ├── 70. Climbing Stairs.cpp
    │   ├── 700. Search in a Binary Search Tree.cpp
    │   ├── 701. Insert into a Binary Search Tree.cpp
    │   ├── 703. Kth Largest Element in a Stream.cpp
    │   ├── 704. Binary Search.cpp
    │   ├── 705. Design HashSet.cpp
    │   ├── 706. Design HashMap.cpp
    │   ├── 709. To Lower Case.cpp
    │   ├── 72. Edit Distance.cpp
    │   ├── 724. Find Pivot Index.cpp
    │   ├── 73. Set Matrix Zeroes.cpp
    │   ├── 733. Flood Fill.cpp
    │   ├── 743. Network Delay Time.cpp
    │   ├── 746. Min Cost Climbing Stairs.cpp
    │   ├── 75. Sort Colors.cpp
    │   ├── 76. Minimum Window Substring.cpp
    │   ├── 763. Partition Labels.cpp
    │   ├── 767. Reorganize String.cpp
    │   ├── 771. Jewels and Stones.cpp
    │   ├── 775. Global and Local Inversions.cpp
    │   ├── 78. Subsets.cpp
    │   ├── 785. Is Graph Bipartite.cpp
    │   ├── 787. Cheapest Flights Within K Stops.cpp
    │   ├── 788. Rotated Digits.cpp
    │   ├── 79. Word Search.cpp
    │   ├── 797. All Paths From Source to Target.cpp
    │   ├── 8. String to Integer (atoi).cpp
    │   ├── 80. Remove Duplicates from Sorted Array II.cpp
    │   ├── 804. Unique Morse Code Words.cpp
    │   ├── 82. Remove Duplicates from Sorted List II.cpp
    │   ├── 824. Goat Latin.cpp
    │   ├── 83. Remove Duplicates from Sorted List.cpp
    │   ├── 832. Flipping an Image.cpp
    │   ├── 836. Rectangle Overlap.cpp
    │   ├── 84. Largest Rectangle in Histogram.cpp
    │   ├── 841. Keys and Rooms.cpp
    │   ├── 844. Backspace String Compare.cpp
    │   ├── 859. Buddy Strings.cpp
    │   ├── 865. Smallest Subtree with all the Deepest Nodes.cpp
    │   ├── 867. Transpose Matrix.cpp
    │   ├── 876. Middle of the Linked List.cpp
    │   ├── 877. Stone Game.cpp
    │   ├── 881. Boats to Save People.cpp
    │   ├── 887. Super Egg Drop.cpp
    │   ├── 890. Find and Replace Pattern.cpp
    │   ├── 893. Groups of Special-Equivalent Strings.cpp
    │   ├── 897. Increasing Order Search Tree.cpp
    │   ├── 9. Palindrome Number.cpp
    │   ├── 90. Subsets II.cpp
    │   ├── 904. Fruit Into Baskets.cpp
    │   ├── 905. Sort Array By Parity.cpp
    │   ├── 908. Smallest Range I.cpp
    │   ├── 91. Decode Ways.cpp
    │   ├── 914. X of a Kind in a Deck of Cards.cpp
    │   ├── 92. Reverse Linked List II.cpp
    │   ├── 922. Sort Array By Parity II.cpp
    │   ├── 926. Flip String to Monotone Increasing.cpp
    │   ├── 929. Unique Email Addresses.cpp
    │   ├── 933. Number of Recent Calls.cpp
    │   ├── 94. Binary Tree Inorder Traversal.cpp
    │   ├── 941. Valid Mountain Array.cpp
    │   ├── 946. Validate Stack Sequences.cpp
    │   ├── 949. Largest Time for Given Digits.cpp
    │   ├── 952. Largest Component Size by Common Factor.cpp
    │   ├── 954. Array of Doubled Pairs.cpp
    │   ├── 957. Prison Cells After N Days.cpp
    │   ├── 96. Unique Binary Search Trees.cpp
    │   ├── 967. Numbers With Same Consecutive Differences.cpp
    │   ├── 970. Powerful Integers.cpp
    │   ├── 973. K Closest Points to Origin.cpp
    │   ├── 977. Squares of a Sorted Array.cpp
    │   ├── 98. Validate Binary Search Tree7. Reverse Integer.cpp
    │   ├── 983. Minimum Cost For Tickets.cpp
    │   ├── 987. Vertical Order Traversal of a Binary Tree.cpp
    │   ├── 994. Rotting Oranges..cpp
    │   ├── 997. Find the Town Judge.cpp
    │   ├── 999. Available Captures for Rook.cpp
    │   └── README.MD
├── dynamic programming
    ├── 01_knapsack.cpp
    ├── 01_knapsack_memoization.cpp
    ├── 01_knapsack_recursive.cpp
    ├── 01_knapsack_tabulation.cpp
    ├── 2_egg_n_floor.cpp
    ├── 416. Partition Equal Subset Sum.cpp
    ├── boolean_patenthesization_memoization.cpp
    ├── boolean_patenthesization_recursive.cpp
    ├── coin_change_min_num_of_ways.cpp
    ├── coin_change_num_of_ways.cpp
    ├── decode_ways.cpp
    ├── egg_drop_all.cpp
    ├── egg_dropping_memoization.cpp
    ├── egg_dropping_recursive.cpp
    ├── longest_common_subsequence_memoization.cpp
    ├── longest_common_subsequence_recursive.cpp
    ├── longest_common_subsequence_tabulation.cpp
    ├── longest_common_substring_tabulation.cpp
    ├── longest_palindromic_subsequence.cpp
    ├── longest_repeating_subsequence.cpp
    ├── matrix_chain_multiplication_memoization.cpp
    ├── matrix_chain_multiplication_recursive.cpp
    ├── max_path_sum_top_left_to_bottom_right_corner.cpp
    ├── max_sum_increasing_subsequence.cpp
    ├── maximal_square.cpp
    ├── min_cost_climbing_stairs.cpp
    ├── min_days_to_eat_n_oranges.cpp
    ├── min_num_of_deletion_to_make_palindrome.cpp
    ├── min_num_of_insertion_deletion.cpp
    ├── min_num_of_insertion_to_make_palindrome.cpp
    ├── min_path_sum.cpp
    ├── minimum_sum_partition.cpp
    ├── palindromic_partitioning_memoization.cpp
    ├── palindromic_partitioning_recursive.cpp
    ├── print_longest_common_subsequence.cpp
    ├── print_shortest_common_supersequence.cpp
    ├── rod_cutting.cpp
    ├── sequence_pattern_matching.cpp
    ├── shortest_common_supersequence.cpp
    ├── subset_count_with_given_difference.cpp
    ├── subset_sum.cpp
    ├── subset_sum_count.cpp
    ├── unbounded_01_knapsack.cpp
    ├── unique_path_in_matrix.cpp
    └── unique_paths.cpp
├── graph
    ├── adjList_graph_weighted.cpp
    ├── adjacentList_graph.cpp
    ├── adjacentList_graph_containg_letters_as_values.cpp
    ├── bfs.cpp
    ├── bipartite_graph.cpp
    ├── celebrity_problem.cpp
    ├── clone_a_graph.cpp
    ├── cycle_detection_directed_graph_dfs.cpp
    ├── cycle_detection_undirected_graph_bfs.cpp
    ├── cycle_detection_undirected_graph_dfs.cpp
    ├── dfs.cpp
    ├── dijkstras_algorithm.cpp
    ├── finding_bridges_in_a_graph.cpp
    ├── full_dfs.cpp
    ├── invert_graph.cpp
    ├── kosarajus_algorithm.cpp
    ├── minimum_spanning_tree_prims.cpp
    ├── prims_mst_algorithm.cpp
    ├── rotten_oranges.cpp
    └── transitive_closure_graph.cpp
├── linked list
    ├── LRU_Cache.cpp
    ├── add_two_numbers_2_in_form_of_linked_list.cpp
    ├── add_two_numbers_in_form_of_linked_list.cpp
    ├── copy_list_with_random_pointer.cpp
    ├── create_linked_list.cpp
    ├── delete_given_node_in_linked_list.cpp
    ├── detect_cycle_in_linked_list.cpp
    ├── find_node_where_cycle_begins_in_linked_list.cpp
    ├── flatten_multilevel_doubly_linked_list.cpp
    ├── intersection_of_two_linked_list.cpp
    ├── maximum_twin_sum_in_linked_list.cpp
    ├── merge_two_sorted_list.cpp
    ├── middle_of_the_linked_list.cpp
    ├── pairwise_swap.cpp
    ├── palindrome_check.cpp
    ├── remove_all_duplicates_sorted_linked_list.cpp
    ├── remove_all_nodes_which_has_right_node_with_greater_value.cpp
    ├── remove_duplicates_sorted_linked_list.cpp
    ├── remove_duplicates_unsorted_linked_list.cpp
    ├── remove_element_in_linked_list.cpp
    ├── remove_nth_node_from_end_of_linked_list.cpp
    ├── reorder_odd_even_linked_list.cpp
    ├── reverse_linked_list.cpp
    ├── reverse_linked_list_in_groups_of_k.cpp
    ├── reverse_linked_list_in_range.cpp
    ├── rotate_linked_list_right_k_places.cpp
    ├── sort_linked_list.cpp
    ├── swap_actual_x_y_nodes_from_linked_list.cpp
    └── swap_kth_node_from_begin_end_in_linked_list.cpp
├── mathematical
    ├── catalan.cpp
    ├── check_if_prime.cpp
    ├── euler_totient_function.cpp
    ├── euler_totient_function_from_1_to_n.cpp
    ├── extended_eucledian_algorithm.cpp
    ├── fermats_primality_test.cpp
    ├── gcd_a_b.cpp
    ├── linear_diophantine_equation.cpp
    ├── matrix_exponentiation.cpp
    ├── segmented_sieve.cpp
    ├── seive_of_eratosthenes.cpp
    ├── trailing_zeros_in_factorial.cpp
    ├── x_power_n_negative_decimal.cpp
    └── x_power_y.cpp
├── matrix
    ├── diagonal_sum_matrix.cpp
    ├── rotate_matrix_90_anticlockwise.cpp
    ├── spiral_matrix.cpp
    └── spiral_matrix_2.cpp
├── recursion
    ├── Geek-onacci Number.cpp
    ├── Geeks's Garden.cpp
    └── Reach the target.cpp
├── sdeProblemSheet.md
├── sliding window
    ├── find_all_anagram_position.cpp
    ├── find_permutation_in_string.cpp
    ├── first_negative_in_every_window_of_size_k.cpp
    ├── longest_repeating_character_replacement.cpp
    ├── longest_substring_with_exactly_k_distinct_characters.cpp
    ├── longest_substring_without_repeating_characters.cpp
    ├── max_continous_ones_with_k_0_flips.cpp
    ├── max_element_in_every_window_of_size_k.cpp
    ├── max_length_subarray_having_2_distinct_element.cpp
    ├── max_sum_subarray_of_size_k.cpp
    ├── maximum_num_of_vowel_in_a_window.cpp
    ├── min_length_subarray_with_target_sum.cpp
    └── smallest_window_containing_substring.cpp
├── stack
    ├── max_rectangular_area_histogram.cpp
    ├── min_stack_O(1).cpp
    ├── min_stack_extra_space.cpp
    ├── next_larger_element_in_array.cpp
    └── stock_span_problem.cpp
├── string
    ├── add_binary_numbers.cpp
    ├── decode_string.cpp
    ├── excel_sheet_column_number.cpp
    ├── extra_char_in_string.cpp
    ├── integer_or_string_check.cpp
    ├── isZero.cpp
    ├── kmp_string_matching.cpp
    ├── miising_char_to_make_pangram.cpp
    ├── min_character_to_add_in_front_to_make_string_palindrome.cpp
    ├── num_of_palindromic_substrings.cpp
    ├── palindromic_anagram.cpp
    ├── pangram_check.cpp
    ├── pangrammatic_lipogram.cpp
    ├── rabin_karp.cpp
    ├── round_to_nearest_ten.cpp
    ├── seperate_adjacent_characters_in_string.cpp
    └── z_algorithm_string_matching.cpp
├── tree
    ├── binary_search_tree_iterator.cpp
    ├── binary_tree_to_doubly_linked_list.cpp
    ├── bottom_order_view.cpp
    ├── check_isvalid_bst.cpp
    ├── complete_binary_tree_using_array.cpp
    ├── complete_binary_tree_using_given_array.cpp
    ├── count_bst_nodes_in_a_range.cpp
    ├── count_nodes_in_a_complete_binary_tree.cpp
    ├── create_bst.cpp
    ├── create_bst_duplicates.cpp
    ├── delete_even_rows.cpp
    ├── deletion_in_binary_tree.cpp
    ├── diameter_of_binary_tree.cpp
    ├── floor_and_ceil_of_a_bst.cpp
    ├── inorder_traversal_recursive.cpp
    ├── inorder_traversal_without_recursion.cpp
    ├── insertion_binary_tree_levelorder.cpp
    ├── invert_a_binary_tree.cpp
    ├── kth_largest_element_bst.cpp
    ├── kth_smallest_element_bst.cpp
    ├── largest_bst_in_binary_tree.cpp
    ├── largest_root_to_leaf_sum.cpp
    ├── left_view_simple_recusion.cpp
    ├── left_view_using_level_order.cpp
    ├── levelorder_traversal_using_queue.cpp
    ├── max_path_sum_any_node_to_node_binary_tree.cpp
    ├── merge_binary_trees.cpp
    ├── palindromic_binary_tree.cpp
    ├── postorder_traversal_recursive.cpp
    ├── postorder_traversal_without_recusrion_one_stack.cpp
    ├── postorder_traversal_without_recusrion_two_stack.cpp
    ├── predecessor_successor_in_bst.cpp
    ├── preorder_traversal_recursive.cpp
    ├── preorder_traversal_without_recursion.cpp
    ├── range_sum_query_segment_tree.cpp
    ├── simple_tree.cpp
    ├── sum_of_Digit_Paths_in_a_Tree.cpp
    ├── sum_of_right_leaves.cpp
    ├── top_order_view.cpp
    ├── trie_insert_and_search.cpp
    ├── update_node_with_left_righ_subtree_sum.cpp
    └── vertical_order_traversal.cpp
└── two pointers
    └── num_of_subsequences_that_staisfiy_sum_condition.cpp


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