├── .gitignore ├── README.md ├── careercup ├── all_permutation.py ├── anagrams.py ├── find_all_paths.py ├── find_path.py ├── find_shortest_path.py ├── find_string.py ├── imp_heap.py ├── longest_palindrome.cpp ├── most_frequent.py ├── mystack.cpp ├── oddman.py ├── palindrome.cpp ├── palindrome_number.cpp ├── parinthesis.cpp ├── print_levels.cpp ├── random_linkedlist.cpp ├── reverse_linked.cpp ├── top10urls.py └── unique_chars.py ├── contests ├── compress_the_string.py └── misery_jar_binks.py ├── cool_stuff ├── download-coursera.py └── download-mp3.py ├── geeks-for-geeks ├── allEvenToLeftOddToRight.py └── products_of_all_ints_except_at_index.py ├── interview-problems ├── 1-flood_fill │ └── flood_fill.cpp ├── 11-binary_division │ ├── binary_division.cpp │ └── binary_division.input ├── 12-lru_cache │ ├── lru_cache.cpp │ ├── lru_cache.h │ └── lru_cache.input ├── 13-element-uniqueness │ └── element-uniqueness.cpp ├── 14-shuffle │ ├── shuffle.cpp │ └── shuffle.h ├── 16-k_modes │ ├── k_modes.cpp │ └── k_modes.input ├── 17-find_bst_kth_element │ ├── find_bst_kth_element.cpp │ └── find_bst_kth_element.h ├── 18-square_root │ ├── square_root.cpp │ └── square_root.h ├── 2-edge_fill │ └── edge_fill.cpp ├── 27-string_permutations │ ├── string_permutations.cpp │ └── string_permutations.input ├── 3-count_words │ └── count_words.cpp ├── 30-parenthesis_combinations │ └── parenthesis_combinations.cpp ├── 31-is_bianry_tree_symmetric │ └── is_bianry_tree_symmetric.cpp ├── 32-pick_random_element │ └── pick_random_element.cpp ├── 4-binary_tree_reverse │ └── binary_tree_reverse.cpp ├── 48-2sum_3sum │ ├── 2sum_3sum.cpp │ ├── test_1.input │ ├── test_2.input │ ├── test_3.input │ ├── test_4.input │ └── test_5.input ├── 5-most_overlapped_point │ ├── most_overlapped_point.cpp │ └── most_overlapped_point.input ├── 6-set_intersection │ ├── set_intersection.cpp │ └── set_intersection.input ├── 62-partition_uniques_duplicates │ └── partition_uniques_duplicates.cpp ├── 65-three_points_form_triangle │ ├── colinear.input │ ├── three_points_form_triangle.cpp │ └── triangle.input ├── 66-deep_iterator │ ├── deep_iterator.cpp │ └── deep_iterator.input ├── 67-list_cycle │ ├── list_cycle.cpp │ ├── list_cycle.h │ ├── test0.input │ ├── test1.input │ ├── test2.input │ ├── test3.input │ ├── test4.input │ ├── test5.input │ ├── test6.input │ ├── test7.input │ ├── test8.input │ └── test9.input ├── 69-print_binary_tree │ ├── print_binary_tree.cpp │ └── print_binary_tree.h ├── 7-binary_tree_depth │ └── binary_tree_depth.cpp ├── 71-cross_fill_zeroes │ └── cross_fill_zeroes.cpp ├── 72-coin_probabilities │ ├── coin1.input │ ├── coin_probabilities.cpp │ ├── coins2.input │ ├── coins3.input │ ├── coins4.input │ └── coins5.input ├── 73-string_combinations │ ├── string_combinations.cpp │ └── string_combinations.input ├── 74-find_graph_components │ ├── find_graph_components.cpp │ └── find_graph_components.input ├── 77-array_shift │ ├── array_shift.cpp │ ├── test_0.input │ ├── test_1.input │ ├── test_2.input │ ├── test_3.input │ ├── test_5.input │ ├── test_6.input │ ├── test_7.input │ ├── test_8.input │ └── test_9.input ├── 78-find_buggy_revision │ ├── find_buggy_revision.cpp │ ├── test0.input │ ├── test1.input │ ├── test2.input │ ├── test3.input │ ├── test4.input │ ├── test5.input │ ├── test6.input │ ├── test7.input │ └── test8.input ├── 8-is_binary_tree_balanced │ └── is_binary_tree_balanced.cpp ├── 80-reverse_print_list │ └── reverse_print_list.cpp ├── 9-reverse_linked_list │ ├── reverse_linked_list.cpp │ └── reverse_linked_list.h ├── README.md ├── arrays │ ├── allevennumberstoleft │ │ └── AllEvensToLeftandOddsToRight.java │ ├── allpathsinamatrix │ │ └── AllPathsInAMatrix.java │ ├── ascsubsequencemaxproduct │ │ ├── SubsequenceProduct.java │ │ └── Test.java │ ├── circularshiftintarray │ │ ├── CircularShiftArray.java │ │ └── Test.java │ ├── closest_pair_two_arrays │ │ ├── ClosestPair.java │ │ └── README.md │ ├── fillmatrixwithones │ │ └── FillBinaryMatrixWithOnes.java │ ├── findarray │ │ ├── FindArray.java │ │ └── FindArrayImpl.java │ ├── findduplicatecountsortedarray │ │ └── DuplicatesCountInSortedArray.java │ ├── findpairsequaltosum │ │ └── FindPairsEqualToSum.java │ ├── indexequaltonumbersortedarray │ │ └── IndexEqualToNumberSortedArray.java │ ├── maxsubarray │ │ ├── FindMaxSubArray.java │ │ └── TestMax.java │ ├── mindiffsortedarrays │ │ └── MinimumDifferenceSortedArrays.java │ ├── numberfrequency │ │ └── PrintNumbersWithFrequency.java │ ├── numberwithhighestfreq │ │ └── FindNumberWithHighestFreq.java │ ├── randomizearray │ │ └── RandomizeArray.java │ ├── searchrotatedsortedarray │ │ └── SearchInRotatedSortedArray.java │ └── test │ │ ├── TestFindPairsEqualToSum.java │ │ ├── TestMoveAllEvensToLeft.java │ │ └── TestPrintNumbersWithFrequency.java ├── collections │ ├── cartesianproblem │ │ └── CartesianOfLists.java │ ├── commonelementsortedsets │ │ └── FindCommonElementsInSortedSetsOrLists.java │ ├── customlinkedlist │ │ ├── Link.java │ │ ├── LinkedList.java │ │ └── LinkedListImpl.java │ ├── detectlinkedlistloop │ │ └── DetectLinkedListLoop.java │ ├── findNTHlastelement │ │ └── FindNthLastElement.java │ ├── loopstartlinkedlist │ │ └── FindStartPointOfLoop.java │ ├── nestedliststring │ │ └── NestedList.java │ ├── nestedlistsum │ │ └── NestedListSum.java │ ├── removeduplicatesfromlinkedlist │ │ └── RemoveDuplicatesFromLinkedList.java │ ├── reverselinkedlist │ │ └── ReverseLinkedList.java │ └── test │ │ ├── TestCartesianOfLists.java │ │ ├── TestNestedList.java │ │ ├── TestNestedListSum.java │ │ └── TestNthElementInLinkList.java ├── compile_all.sh ├── count_all.sh ├── customiterator │ ├── Animal.java │ ├── AnimalIterator.java │ └── TestIterator.java ├── exercises.md ├── go.sh ├── graphs │ ├── breadthfirstsearch │ │ └── BFS.java │ ├── depthfirstsearch │ │ └── DFS.java │ ├── filedependencyresolution │ │ ├── FileDependency.java │ │ ├── FileDependencyImpl.java │ │ ├── FileOptions.java │ │ └── client │ │ │ └── FileDependencyClient.java │ ├── graph │ │ ├── AbstractGraph.java │ │ ├── DirectedGraph.java │ │ ├── Graph.java │ │ ├── UnDirectedGraph.java │ │ └── Vertex.java │ └── test │ │ └── TestDG.java ├── heaps │ ├── heap │ │ ├── AbstractHeap.java │ │ ├── Heap.java │ │ ├── MaxHeap.java │ │ ├── MinHeap.java │ │ └── model │ │ │ └── Node.java │ └── test │ │ └── TestMaxHeap.java ├── maps │ ├── customhashmap │ │ ├── CustomHashMap.java │ │ └── CustomHashMapImpl.java │ ├── lrucache │ │ └── LRUCache.java │ ├── sortofvaluesinmap │ │ └── SortOnValuesInMap.java │ └── test │ │ ├── TestCustomMap.java │ │ └── TestLRUCache.java ├── misc │ ├── add_interval_total_length │ │ └── AddInterval.java │ ├── blocking_queue │ │ └── BlockingQueue.java │ ├── bubbleSort.js │ ├── count_the_number_of_possible_triangles │ │ ├── Counter.java │ │ └── README.md │ ├── counter_digits.js │ ├── fib_series.py │ ├── intimate_numbers │ │ ├── README.md │ │ └── Solution.java │ ├── iterative_merge_sort │ │ └── IterativeMergeSort.java │ ├── iterative_quick_sort │ │ └── Solution.java │ ├── largest_slope │ │ └── README.md │ ├── longest_increasing_subsequence │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── lowest_common_ancestor │ │ ├── README.md │ │ └── Solution.java │ ├── minimum_unsorted_subarray │ │ ├── README.md │ │ └── Solution.java │ ├── mirror_binary_tree │ │ └── README.md │ ├── nestedSum.py │ ├── number_all_factors │ │ ├── NumberFactors.java │ │ └── README.md │ ├── prime_count_in_range │ │ ├── README.md │ │ └── Solution.java │ ├── print_one_to_hundred │ │ └── Print.java │ ├── replace_word_in_string │ │ ├── README.md │ │ └── Replace.java │ ├── reverse_list_recursive │ │ └── ReverseList.java │ ├── runLengthEncoding.py │ ├── sortOrder.py │ ├── text_file_iterable │ │ ├── README.md │ │ └── TextFile.java │ └── ugly_number │ │ ├── README.md │ │ └── Solution.java ├── numberproblems │ ├── concatenatenumbers │ │ └── ConcatenateNumbers.java │ ├── convertstringtonumber │ │ └── ConvertStringToNum.java │ ├── exponentialnumber │ │ └── ExponentialOfNumber.java │ ├── factorial │ │ ├── Factorial.java │ │ └── FactorialNoOfTrailingZeroes.java │ ├── findmissingnumber │ │ └── FindMissingNumber.java │ ├── oddoreven │ │ └── OddOrEven.java │ ├── printprimefactors │ │ └── PrintPrimeFactorsOfANumber.java │ ├── productofdigitsequaltonumber │ │ └── ProductOfDigitsEqualToNumber.java │ ├── swapnumbers │ │ └── SwapNumbers.java │ └── test │ │ ├── TestConvert.java │ │ ├── TestFindMissingNumber.java │ │ └── TestSwap.java ├── objects │ ├── cloning │ │ └── linkedlistclone │ │ │ └── LinkedListCloning.java │ ├── immutableclass │ │ ├── ImmutableClass.java │ │ └── TestImmutability.java │ ├── passbyvalue │ │ ├── Dog.java │ │ └── PassByValue.java │ └── singleton │ │ ├── SingletonUsingDoubleCheckLocking.java │ │ └── SingletonUsingStatic.java ├── prep │ ├── binary_tree.h │ ├── bitmap_paint.h │ ├── color.h │ ├── line.h │ ├── matrix.h │ ├── point.h │ ├── random.h │ ├── slist.h │ └── tree.h ├── sorting │ ├── algorithms │ │ ├── BubbleSort.java │ │ ├── InsertionSort.java │ │ ├── MergeSort.java │ │ ├── QuickSort.java │ │ ├── SelectionSort.java │ │ └── ShellSort.java │ └── test │ │ └── TestSorting.java ├── stackqueues │ ├── customstackwithpushpopgetmin │ │ ├── CustomStack.java │ │ ├── CustomStackImpl.java │ │ └── TestCustomStack.java │ ├── parenthesismatching │ │ └── ParenthesisMatching.java │ ├── queueusingstack │ │ └── QueueUsingStack.java │ └── stacksorting │ │ └── StackSorting.java ├── strings │ ├── checkpalindrome │ │ └── CheckPalindrome.java │ ├── distancebetweenwords │ │ └── DistanceBetweenWords.java │ ├── findcommonprefix │ │ └── CommonPrefix.java │ ├── findduplicates │ │ └── FindDuplicates.java │ ├── findlatestversion │ │ ├── FindLatestVersion.java │ │ └── TestFindLatestVersion.java │ ├── findlongestcommonsubsequence │ │ └── LCS.java │ ├── findlongestpalindrome │ │ ├── FindLongestPalindrome.java │ │ └── Test.java │ ├── findpermutations │ │ ├── FindPermutations.java │ │ └── TestPermutations.java │ ├── findtotalpalindromes │ │ ├── FindTotalNoOfPalindromes.java │ │ └── Test.java │ ├── firstnonrepeatedchar │ │ ├── FirstNonRepeatedChar.java │ │ └── Test.java │ ├── isomorphicstrings │ │ └── Isomorphic.java │ ├── longestsubstringnorepeatedchar │ │ └── LongestSubstringUnrepeatedChar.java │ ├── minimumsubstringcontains │ │ └── MinimumSubstring.java │ ├── printdiamonds │ │ ├── PrintDiamonds.java │ │ └── TestDiamonds.java │ ├── repeatingstringsofspecifiedlength │ │ └── RepeatingStringOfSpecificLength.java │ ├── reversestring │ │ ├── ReverseString.java │ │ └── Test.java │ ├── segmentstringfindalldictwords │ │ └── StringSegmentation.java │ ├── stringsubsequencecheck │ │ ├── CheckStringSubsequence.java │ │ └── TestSubsequence.java │ ├── substringcheckforrotatedstring │ │ └── RotatedStringSubStringCheck.java │ ├── test │ │ └── TestClass.java │ ├── uniquecharscheck │ │ └── CheckUniqueCharacters.java │ └── wordcountinlargefile │ │ └── WordOccurencesInLargeFile.java ├── threads │ ├── blockingqueue │ │ └── BlockingQueue.java │ ├── main │ │ └── ThreadExample.java │ └── simulatedeadlock │ │ └── DeadLockOreilly.java └── trees │ ├── checkbalancedtree │ └── CheckBalancedTree.java │ ├── checksubtree │ └── CheckSubtree.java │ ├── commonancestorbinarytree │ └── CommonAncestorBinaryTree.java │ ├── diameteroftree │ └── DiameterOfTree.java │ ├── findallpathsequaltosum │ └── FindAllPathsEqualToSum.java │ ├── findsumofallnodesexceptleaf │ └── FindSumOfAllNodesExceptLeaf.java │ ├── isbst │ └── CheckIfTreeIsBst.java │ ├── leastcommonancestorbst │ └── FindLeastCommonAncestorBST.java │ ├── leftviewofatree │ └── LeftViewOfATree.java │ ├── mirrorgiventree │ └── MirrorGivenTree.java │ ├── mirrortree │ └── MirrorTree.java │ ├── model │ ├── AbstractNode.java │ ├── BinarySearchTree.java │ ├── BinarySearchTreeImpl.java │ ├── GenericNode.java │ ├── SearchNode.java │ └── TraverseType.java │ ├── printnarytreewithlevels │ └── PrintNaryTreeWithLevels.java │ ├── sortedarraytobalancedtree │ └── SortedArrayToBalancedTree.java │ └── test │ ├── TestBalancedTree.java │ ├── TestBinarySearchTree.java │ ├── TestFindSumExceptLeafNodes.java │ ├── TestMirror.java │ └── TestSubtree.java ├── leet-code ├── README.md ├── anagram.py ├── combinations_ph_number.py ├── contains_duplicate_i.py ├── contains_duplicate_ii.py ├── contains_duplicate_iii.py ├── copyLinkedListWithRandomPointer_1Space.py ├── copyLinkedListWithRandomPointer_nSpace.py ├── delete_node_in_linked_list.py ├── deserialize.py ├── excel_sheet_column_number.js ├── happyNumber.js ├── implement_queue_using_stacks.py ├── intersectionLinkedList.py ├── isPalindromeNumber.py ├── largestNumber.js ├── lengthOfLastWord.py ├── min_depth_binary_tree.py ├── pascalsTriangle.py ├── remove_element.py ├── remove_linked_elements.py ├── reverseInteger.py ├── reverseWords.py ├── rotateArray.js ├── src │ ├── 3Sum │ │ ├── README.md │ │ └── Solution.java │ ├── 3SumClosest │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── 4sum │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── LRUcache │ │ ├── LRUCache.java │ │ └── README.md │ ├── addBinary │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── addTwoNumbers │ │ ├── README.md │ │ └── Solution.java │ ├── add_and_search_word_data_structure_design │ │ ├── README.md │ │ └── WordDictionary.java │ ├── anagram │ │ ├── README.md │ │ ├── Solution.java │ │ └── solution.py │ ├── atoi │ │ ├── README.md │ │ └── Solution.java │ ├── balanced_binary_tree │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── basic_calculator │ │ ├── README.md │ │ └── Solution.java │ ├── basic_calculator_ii │ │ ├── README.md │ │ └── Solution.java │ ├── best_time_to_buy_and_sell_stock_iv │ │ ├── README.md │ │ └── Solution.java │ ├── binaryTreeMaxPathSum │ │ ├── README.md │ │ └── Solution.java │ ├── binaryTreeRightSideView │ │ ├── README.md │ │ └── Solution.java │ ├── binaryTreeUpsideDown │ │ ├── README.md │ │ └── Solution.java │ ├── binaryTreeZigzag │ │ ├── README.md │ │ └── Solution.java │ ├── binary_search_tree_iterator │ │ ├── BSTIterator.java │ │ └── README.md │ ├── bitwiseAndRange │ │ ├── README.md │ │ └── Solution.java │ ├── buildTreeInOrderPostOrder │ │ ├── README.md │ │ └── Solution.java │ ├── buildTreePreOrderInOrder │ │ ├── README.md │ │ └── Solution.java │ ├── candy │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── climbStairs │ │ ├── README.md │ │ └── Solution.java │ ├── cloneGraph │ │ ├── README.md │ │ └── Solution.java │ ├── combination │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── combinationSum │ │ ├── README.md │ │ ├── Solution.java │ │ ├── Solution2.java │ │ └── main.py │ ├── combinationSumII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── combination_sum_iii │ │ ├── README.md │ │ └── Solution.java │ ├── compare_version_number │ │ ├── README.md │ │ └── Solution.java │ ├── containerWithMostWater │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── contains_duplicate │ │ ├── README.md │ │ └── Solution.java │ ├── contains_duplicate_ii │ │ ├── README.md │ │ └── Solution.java │ ├── contains_duplicate_iii │ │ ├── README.md │ │ └── Solution.java │ ├── copyListWithRandomPointer │ │ ├── README.md │ │ └── Solution.java │ ├── countAndSay │ │ ├── README.md │ │ └── Solution.java │ ├── count_complete_tree_nodes │ │ ├── README.md │ │ └── Solution.java │ ├── count_primes │ │ ├── README.md │ │ └── Solution.java │ ├── course_schedule │ │ ├── README.md │ │ └── Solution.java │ ├── course_schedule_ii │ │ ├── README.md │ │ └── Solution.java │ ├── decodeWays │ │ ├── README.md │ │ └── Solution.java │ ├── delete_node_in_a_linked_list │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── distinctSubsequence │ │ ├── README.md │ │ └── Solution.java │ ├── divideTwoInteger │ │ ├── README.md │ │ └── Solution.java │ ├── dungeon_game │ │ ├── README.md │ │ └── Solution.java │ ├── edit_distance │ │ ├── README.md │ │ └── Solution.java │ ├── evaluateReversePolish │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── excel_sheet_column_number │ │ ├── README.md │ │ └── Solution.java │ ├── excel_sheet_column_title │ │ ├── README.md │ │ └── Solution.java │ ├── factorial_trailing_zeroes │ │ ├── README.md │ │ └── Solution.java │ ├── find_minimum_in_rotated_sorted_array │ │ ├── README.md │ │ └── Solution.java │ ├── find_minimum_in_rotated_sorted_array_II │ │ ├── README.md │ │ └── Solution.java │ ├── find_peak_element │ │ ├── README.md │ │ ├── Solution.java │ │ └── solution.py │ ├── firstMissingPositive │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── flattenBinaryTreeToList │ │ ├── README.md │ │ ├── Solution.java │ │ ├── Solution.py │ │ └── Solution2.java │ ├── fraction_to_recurring_decimal │ │ ├── README.md │ │ └── Solution.java │ ├── gasStation │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── generateParentheses │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── grayCode │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── happy_number │ │ ├── README.md │ │ └── Solution.java │ ├── house_robber │ │ ├── README.md │ │ └── Solution.java │ ├── house_robber_ii │ │ ├── README.md │ │ └── Solution.java │ ├── implement_queue_using_stacks │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── implement_stack_using_queues │ │ ├── MyStack.java │ │ └── README.md │ ├── implement_strstr │ │ ├── README.md │ │ └── Solution.java │ ├── implement_trie_prefix_tree │ │ ├── README.md │ │ └── Trie.java │ ├── inOrderTraversal │ │ ├── README.md │ │ ├── Solution.java │ │ └── solution.py │ ├── insertInterval │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── insertionSortList │ │ ├── README.md │ │ └── Solution.java │ ├── integerToRoman │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── interleaveString │ │ ├── README.md │ │ └── Solution.java │ ├── intersection_of_two_linked_lists │ │ ├── README.md │ │ └── Solution.java │ ├── invert_binary_tree │ │ ├── README.md │ │ └── Solution.java │ ├── isValidSudoku │ │ ├── 250px-Sudoku-by-L2G-20050714.svg.png │ │ ├── README.md │ │ └── Solution.java │ ├── isomorphic_strings │ │ ├── README.md │ │ └── Solution.java │ ├── jumpGame │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── jumpGameII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── kth_largest_element_in_an_array │ │ ├── README.md │ │ └── Solution.java │ ├── kth_smallest_element_in_a_bst │ │ ├── README.md │ │ └── Solution.java │ ├── largestRectangleHistogram │ │ ├── README.md │ │ ├── Solution.cpp │ │ ├── Solution.java │ │ ├── histogram.png │ │ ├── histogram_area.png │ │ └── main.py │ ├── largest_number │ │ ├── README.md │ │ └── Solution.java │ ├── lengthOfLastWord │ │ ├── README.md │ │ └── Solution.java │ ├── letterCombinationPhoneNumber │ │ ├── 200px-Telephone-keypad2.svg.png │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── levelOrder │ │ ├── README.md │ │ └── Solution.java │ ├── levelOrderII │ │ ├── README.md │ │ └── Solution.java │ ├── linkedListCycle │ │ ├── README.md │ │ └── Solution.java │ ├── linkedListCycleII │ │ ├── README.md │ │ └── Solution.java │ ├── longestCommonPrefix │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── longestConsecutiveSequence │ │ ├── README.md │ │ ├── Solution.java │ │ └── longest.py │ ├── longestPalindromeSubstring │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.cpp │ ├── longestSubstringWith2UniqueChars │ │ ├── README.md │ │ └── Solution.java │ ├── longestSubstringWithoutRepeatingCharacters │ │ ├── README.md │ │ └── Solution.java │ ├── longestValidParentheses │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── lowest_common_ancestor_of_a_binary_search_tree │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── lowest_common_ancestor_of_a_binary_tree │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── majority_element │ │ ├── README.md │ │ └── Solution.java │ ├── majority_element_ii │ │ ├── README.md │ │ └── Solution.java │ ├── maxDepthOfBinaryTree │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── maxPointsOnALine │ │ ├── README.md │ │ ├── Solution.java │ │ ├── Solution2.java │ │ └── main.py │ ├── maxSubArray │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── max_product_subarray │ │ ├── README.md │ │ └── Solution.java │ ├── maximalRectangle │ │ ├── README.md │ │ └── Solution.java │ ├── maximal_square │ │ ├── README.md │ │ └── Solution.java │ ├── maximum_gap │ │ ├── README.md │ │ └── Solution.java │ ├── medianTwoSorted │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── merge2Sorted │ │ ├── README.md │ │ └── Solution.java │ ├── mergeIntervals │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── mergeKSorted │ │ ├── README.md │ │ └── Solution.java │ ├── mergeSortedArray │ │ ├── README.md │ │ └── Solution.java │ ├── minDepthOfTree │ │ ├── README.md │ │ └── Solution.java │ ├── minPathSum │ │ ├── README.md │ │ └── Solution.java │ ├── minWindowSubstring │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── min_stack │ │ ├── MinStack.java │ │ └── README.md │ ├── minimum_size_subarray_sum │ │ ├── README.md │ │ └── Solution.java │ ├── missingRanges │ │ ├── README.md │ │ └── Solution.java │ ├── multiplyString │ │ ├── README.md │ │ └── Solution.java │ ├── nQueens │ │ ├── README.md │ │ └── Solution.java │ ├── nQueensII │ │ ├── README.md │ │ └── Solution.java │ ├── nextPermutation │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── number_1_bits │ │ ├── README.md │ │ └── Solution.java │ ├── number_of_digit_one │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── number_of_islands │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── nutsInOasis │ │ ├── NutsInOasis.java │ │ ├── NutsInOasisTest.java │ │ └── README.md │ ├── one_edit_distance │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── palindromeNumber │ │ ├── README.md │ │ ├── Solution.java │ │ ├── main.py │ │ └── palindrome.cpp │ ├── palindromePartition │ │ ├── README.md │ │ └── Solution.java │ ├── palindromePartitionII │ │ ├── README.md │ │ └── Solution.java │ ├── palindrome_linked_list │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── partitionList │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── partitionPainter │ │ ├── README.md │ │ └── partitionPainter.py │ ├── pascal │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── pascalII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── pathSum │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── pathSumII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── permutationSequence │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── permutations │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── plusOne │ │ ├── README.md │ │ └── Solution.java │ ├── populateNextRight │ │ ├── README.md │ │ └── Solution.java │ ├── populateNextRightII │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── postOrderTraversal │ │ ├── README.md │ │ ├── Solution.java │ │ ├── main.py │ │ ├── main2.py │ │ └── main3.py │ ├── pow_x_n │ │ ├── README.md │ │ └── Solution.java │ ├── power_of_two │ │ ├── README.md │ │ └── Solution.java │ ├── preOrderTraversal │ │ ├── README.md │ │ ├── Solution.java │ │ ├── main.py │ │ ├── main2.py │ │ └── main3.py │ ├── printEdge │ │ └── Solution.java │ ├── product_of_array_except_self │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── readNCharactersGivenRead4 │ │ ├── README.md │ │ └── Solution.java │ ├── recoverBinarySearchTree │ │ ├── README.md │ │ └── Solution.java │ ├── rectangle_area │ │ ├── README.md │ │ └── Solution.java │ ├── regularExpressionMatching │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── removeElement │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── removeNthNodeList │ │ ├── README.md │ │ └── Solution.java │ ├── remove_duplicate_from_sorted_array │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── remove_duplicate_from_sorted_array_ii │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── remove_duplicate_sorted_list │ │ ├── README.md │ │ └── Solution.java │ ├── remove_duplicate_sorted_list_ii │ │ ├── README.md │ │ └── Solution.java │ ├── remove_linkedlist_element │ │ ├── README.md │ │ └── Solution.java │ ├── reorderList │ │ ├── README.md │ │ └── Solution.java │ ├── repeated_DNA_sequences │ │ ├── README.md │ │ └── Solution.java │ ├── restoreIPaddress │ │ ├── README.md │ │ └── Solution.java │ ├── reverseInteger │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── reverseKgroup │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── reverseLinkedList2 │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── reverseWordsInString │ │ ├── README.md │ │ ├── Solution.java │ │ └── solution.py │ ├── reverse_bits │ │ ├── README.md │ │ └── Solution.java │ ├── reverse_linkedlist │ │ ├── README.md │ │ └── Solution.java │ ├── romanToInt │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── rotateImage │ │ ├── README.md │ │ ├── Solution.java │ │ └── rotate_matrix.py │ ├── rotateList │ │ ├── README.md │ │ └── Solution.java │ ├── rotate_array │ │ ├── README.md │ │ └── Solution.java │ ├── sameTree │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── scrambleString │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── searchInMatrix │ │ ├── README.md │ │ └── Solution.java │ ├── searchInRotatedList │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── searchInRotatedListII │ │ ├── README.md │ │ └── main.py │ ├── searchInsert │ │ ├── README.md │ │ └── Solution.java │ ├── searchRange │ │ ├── README.md │ │ └── Solution.java │ ├── search_a_2d_matrix_ii │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── setMatrixZero │ │ ├── README.md │ │ ├── Solution.cpp │ │ └── Solution.java │ ├── shortest_palindrome │ │ ├── README.md │ │ ├── Solution.cpp │ │ ├── Solution.java │ │ └── main.py │ ├── simplifyPath │ │ ├── README.MD │ │ ├── Solution.java │ │ └── main.py │ ├── singleNumber │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── singleNumberII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── sliding_window_maximum │ │ ├── Makefile │ │ ├── README.md │ │ └── main.cpp │ ├── sortColors │ │ ├── README.md │ │ └── Solution.java │ ├── sortList │ │ ├── README.md │ │ └── Solution.java │ ├── sortedArrayToBST │ │ ├── README.md │ │ └── Solution.java │ ├── sortedListToBST │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── spiralMatrix │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── spiralMatrixII │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── squareRoot │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── stock1 │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── stock2 │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── stock3 │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── subset │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── substringWithCatAllWords │ │ ├── README.md │ │ └── Solution.java │ ├── sudokuSolver │ │ ├── README.md │ │ └── Solution.java │ ├── sumRootToLeaf │ │ ├── README.md │ │ └── Solution.java │ ├── summary_ranges │ │ ├── README.md │ │ └── Solution.java │ ├── surroundedRegions │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── swapInPairs │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── symmetricTree │ │ ├── README.md │ │ └── Solution.java │ ├── textJustification │ │ ├── README.md │ │ └── Solution.java │ ├── the_skyline_problem │ │ ├── README.md │ │ └── Solution.java │ ├── trappingRainWater │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── triangle │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── twoSum │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── uniqueBST │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── uniqueBST2 │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── uniquePaths │ │ ├── README.md │ │ └── Solution.java │ ├── uniquePathsII │ │ ├── README.md │ │ └── Solution.java │ ├── validBST │ │ ├── README.md │ │ └── Solution.java │ ├── validNumber │ │ ├── README.md │ │ ├── Solution.java │ │ ├── main.cpp │ │ └── main.py │ ├── validPalindrome │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── valid_parentheses │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── wildcardMatching │ │ ├── README.md │ │ ├── Solution.java │ │ └── Solution2.java │ ├── wordBreak │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── wordBreakII │ │ ├── README.md │ │ ├── Solution.java │ │ └── solution.py │ ├── wordLadder │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── wordLadderII │ │ ├── README.md │ │ └── Solution.java │ ├── wordSearch │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py │ ├── word_search_ii │ │ ├── README.md │ │ └── Solution.java │ └── zigzagConversion │ │ ├── README.md │ │ ├── Solution.java │ │ └── main.py ├── strStr.js ├── twoSum.js ├── twoSumSorted.js ├── validPalindrome.js ├── wordSearch.py ├── word_break.js ├── word_break_ii.py └── zig_zag_level_order_traversal.js ├── links ├── Questions.txt ├── algo-questions.txt ├── continue.txt ├── dynamic programming.txt ├── linkedlist_problems.txt ├── oop-design.txt ├── questions1.txt └── yahoo_interview_qs.txt ├── others ├── concentricRectangle.py ├── findNumberInWords.py └── find_issuer.js ├── poker-hands ├── CardSuites.cs ├── Dealer.cs ├── Globals.cs ├── Poker.csproj ├── Program.cs └── Properties │ └── AssemblyInfo.cs ├── project-euler ├── py_euler.py └── verify_solns.txt ├── simpleDatabase.js ├── sudoku ├── SolveProbl.txt ├── Sudoku.cs ├── grid.js ├── qs.txt ├── sudoku_puzzle.txt ├── top95-sudoku-problem.txt └── top95-sudoku-soln.txt └── testDb.js /.gitignore: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/yfcheng/hackerrank/HEAD/.gitignore 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