.problemList.json

{
    "Arrays & Hashing": [
        [
            "Contains Duplicate",
            "https://leetcode.com/problems/contains-duplicate/",
            217
        ],
        [
            "Valid Anagram",
            "https://leetcode.com/problems/valid-anagram/",
            242
        ],
        [
            "Replace Elements With Greatest Element On Right Side",
            "https://leetcode.com/problems/replace-elements-with-greatest-element-on-right-side/",
            1299
        ],
        [
            "Is Subsequence",
            "https://leetcode.com/problems/is-subsequence/",
            392
        ],
        [
            "Length of Last Word",
            "https://leetcode.com/problems/length-of-last-word/",
            58
        ],
        [
            "Two Sum",
            "https://leetcode.com/problems/two-sum/",
            1
        ],
        [
            "Longest Common Prefix",
            "https://leetcode.com/problems/longest-common-prefix/",
            14
        ],
        [
            "Group Anagrams",
            "https://leetcode.com/problems/group-anagrams/",
            49
        ],
        [
            "Pascals Triangle",
            "https://leetcode.com/problems/pascals-triangle/",
            118
        ],
        [
            "Remove Element",
            "https://leetcode.com/problems/remove-element/",
            27
        ],
        [
            "Unique Email Addresses",
            "https://leetcode.com/problems/unique-email-addresses/",
            929
        ],
        [
            "Isomorphic Strings",
            "https://leetcode.com/problems/isomorphic-strings/",
            205
        ],
        [
            "Can Place Flowers",
            "https://leetcode.com/problems/can-place-flowers/",
            605
        ],
        [
            "Majority Element",
            "https://leetcode.com/problems/majority-element/",
            169
        ],
        [
            "Next Greater Element I",
            "https://leetcode.com/problems/next-greater-element-i/",
            496
        ],
        [
            "Find Pivot Index",
            "https://leetcode.com/problems/find-pivot-index/",
            724
        ],
        [
            "Find All Numbers Disappeared In An Array",
            "https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/",
            448
        ],
        [
            "Maximum Number of Balloons",
            "https://leetcode.com/problems/maximum-number-of-balloons/",
            1189
        ],
        [
            "Word Pattern",
            "https://leetcode.com/problems/word-pattern/",
            290
        ],
        [
            "Top K Frequent Elements",
            "https://leetcode.com/problems/top-k-frequent-elements/",
            347
        ],
        [
            "Product of Array Except Self",
            "https://leetcode.com/problems/product-of-array-except-self/",
            238
        ],
        [
            "Valid Sudoku",
            "https://leetcode.com/problems/valid-sudoku/",
            36
        ],
        [
            "Encode And Decode Strings",
            "https://leetcode.com/problems/encode-and-decode-strings/",
            271
        ],
        [
            "Longest Consecutive Sequence",
            "https://leetcode.com/problems/longest-consecutive-sequence/",
            128
        ],
        [
            "Sort Colors",
            "https://leetcode.com/problems/sort-colors/",
            75
        ],
        [
            "Encode And Decode Tinyurl",
            "https://leetcode.com/problems/encode-and-decode-tinyurl/",
            535
        ],
        [
            "Brick Wall",
            "https://leetcode.com/problems/brick-wall/",
            554
        ],
        [
            "Best Time to Buy And Sell Stock II",
            "https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/",
            122
        ],
        [
            "Subarray Sum Equals K",
            "https://leetcode.com/problems/subarray-sum-equals-k/",
            560
        ],
        [
            "Unique Length 3 Palindromic Subsequences",
            "https://leetcode.com/problems/unique-length-3-palindromic-subsequences/",
            1930
        ],
        [
            "Minimum Number of Swaps to Make The String Balanced",
            "https://leetcode.com/problems/minimum-number-of-swaps-to-make-the-string-balanced/",
            1963
        ],
        [
            "Number of Pairs of Interchangeable Rectangles",
            "https://leetcode.com/problems/number-of-pairs-of-interchangeable-rectangles/",
            2001
        ],
        [
            "Maximum Product of The Length of Two Palindromic Subsequences",
            "https://leetcode.com/problems/maximum-product-of-the-length-of-two-palindromic-subsequences/",
            2002
        ],
        [
            "Grid Game",
            "https://leetcode.com/problems/grid-game/",
            2017
        ],
        [
            "Find All Anagrams In a String",
            "https://leetcode.com/problems/find-all-anagrams-in-a-string/",
            438
        ],
        [
            "Find The Index of The First Occurrence In a String",
            "https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/",
            28
        ],
        [
            "Wiggle Sort",
            "https://leetcode.com/problems/wiggle-sort/",
            280
        ],
        [
            "Largest Number",
            "https://leetcode.com/problems/largest-number/",
            179
        ],
        [
            "Continuous Subarray Sum",
            "https://leetcode.com/problems/continuous-subarray-sum/",
            523
        ],
        [
            "Push Dominoes",
            "https://leetcode.com/problems/push-dominoes/",
            838
        ],
        [
            "Repeated Dna Sequences",
            "https://leetcode.com/problems/repeated-dna-sequences/",
            187
        ],
        [
            "Insert Delete Get Random O(1)",
            "https://leetcode.com/problems/insert-delete-getrandom-o1/",
            380
        ],
        [
            "Check if a String Contains All Binary Codes of Size K",
            "https://leetcode.com/problems/check-if-a-string-contains-all-binary-codes-of-size-k/",
            1461
        ],
        [
            "Range Sum Query 2D Immutable",
            "https://leetcode.com/problems/range-sum-query-2d-immutable/",
            304
        ],
        [
            "Non Decreasing Array",
            "https://leetcode.com/problems/non-decreasing-array/",
            665
        ],
        [
            "First Missing Positive",
            "https://leetcode.com/problems/first-missing-positive/",
            41
        ]
    ],
    "Two Pointers": [
        [
            "Valid Palindrome",
            "https://leetcode.com/problems/valid-palindrome/",
            125
        ],
        [
            "Valid Palindrome II",
            "https://leetcode.com/problems/valid-palindrome-ii/",
            680
        ],
        [
            "Minimum Difference Between Highest And Lowest of K Scores",
            "https://leetcode.com/problems/minimum-difference-between-highest-and-lowest-of-k-scores/",
            1984
        ],
        [
            "Reverse String",
            "https://leetcode.com/problems/reverse-string/",
            344
        ],
        [
            "Merge Sorted Array",
            "https://leetcode.com/problems/merge-sorted-array/",
            88
        ],
        [
            "Move Zeroes",
            "https://leetcode.com/problems/move-zeroes/",
            283
        ],
        [
            "Remove Duplicates From Sorted Array",
            "https://leetcode.com/problems/remove-duplicates-from-sorted-array/",
            26
        ],
        [
            "Two Sum II Input Array Is Sorted",
            "https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/",
            167
        ],
        [
            "3Sum",
            "https://leetcode.com/problems/3sum/",
            15
        ],
        [
            "4Sum",
            "https://leetcode.com/problems/4sum/",
            18
        ],
        [
            "Container With Most Water",
            "https://leetcode.com/problems/container-with-most-water/",
            11
        ],
        [
            "Number of Subsequences That Satisfy The Given Sum Condition",
            "https://leetcode.com/problems/number-of-subsequences-that-satisfy-the-given-sum-condition/",
            1498
        ],
        [
            "Rotate Array",
            "https://leetcode.com/problems/rotate-array/",
            189
        ],
        [
            "Array With Elements Not Equal to Average of Neighbors",
            "https://leetcode.com/problems/array-with-elements-not-equal-to-average-of-neighbors/",
            1968
        ],
        [
            "Boats to Save People",
            "https://leetcode.com/problems/boats-to-save-people/",
            881
        ],
        [
            "Trapping Rain Water",
            "https://leetcode.com/problems/trapping-rain-water/",
            42
        ]
    ],
    "Sliding Window": [
        [
            "Best Time to Buy And Sell Stock",
            "https://leetcode.com/problems/best-time-to-buy-and-sell-stock/",
            121
        ],
        [
            "Longest Substring Without Repeating Characters",
            "https://leetcode.com/problems/longest-substring-without-repeating-characters/",
            3
        ],
        [
            "Longest Repeating Character Replacement",
            "https://leetcode.com/problems/longest-repeating-character-replacement/",
            424
        ],
        [
            "Permutation In String",
            "https://leetcode.com/problems/permutation-in-string/",
            567
        ],
        [
            "Frequency of The Most Frequent Element",
            "https://leetcode.com/problems/frequency-of-the-most-frequent-element/",
            1838
        ],
        [
            "Minimum Number of Flips to Make The Binary String Alternating",
            "https://leetcode.com/problems/minimum-number-of-flips-to-make-the-binary-string-alternating/",
            1888
        ],
        [
            "Minimum Size Subarray Sum",
            "https://leetcode.com/problems/minimum-size-subarray-sum/",
            209
        ],
        [
            "Find K Closest Elements",
            "https://leetcode.com/problems/find-k-closest-elements/",
            658
        ],
        [
            "Minimum Window Substring",
            "https://leetcode.com/problems/minimum-window-substring/",
            76
        ],
        [
            "Sliding Window Maximum",
            "https://leetcode.com/problems/sliding-window-maximum/",
            239
        ]
    ],
    "Stack": [
        [
            "Valid Parentheses",
            "https://leetcode.com/problems/valid-parentheses/",
            20
        ],
        [
            "Baseball Game",
            "https://leetcode.com/problems/baseball-game/",
            682
        ],
        [
            "Implement Stack Using Queues",
            "https://leetcode.com/problems/implement-stack-using-queues/",
            225
        ],
        [
            "Min Stack",
            "https://leetcode.com/problems/min-stack/",
            155
        ],
        [
            "Evaluate Reverse Polish Notation",
            "https://leetcode.com/problems/evaluate-reverse-polish-notation/",
            150
        ],
        [
            "Generate Parentheses",
            "https://leetcode.com/problems/generate-parentheses/",
            22
        ],
        [
            "Asteroid Collision",
            "https://leetcode.com/problems/asteroid-collision/",
            735
        ],
        [
            "Daily Temperatures",
            "https://leetcode.com/problems/daily-temperatures/",
            739
        ],
        [
            "Online Stock Span",
            "https://leetcode.com/problems/online-stock-span/",
            901
        ],
        [
            "Car Fleet",
            "https://leetcode.com/problems/car-fleet/",
            853
        ],
        [
            "Simplify Path",
            "https://leetcode.com/problems/simplify-path/",
            71
        ],
        [
            "Decode String",
            "https://leetcode.com/problems/decode-string/",
            394
        ],
        [
            "Remove K Digits",
            "https://leetcode.com/problems/remove-k-digits/",
            402
        ],
        [
            "Remove All Adjacent Duplicates In String II",
            "https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/",
            1209
        ],
        [
            "132 Pattern",
            "https://leetcode.com/problems/132-pattern/",
            132
        ],
        [
            "Maximum Frequency Stack",
            "https://leetcode.com/problems/maximum-frequency-stack/",
            895
        ],
        [
            "Largest Rectangle In Histogram",
            "https://leetcode.com/problems/largest-rectangle-in-histogram/",
            84
        ]
    ],
    "Binary Search": [
        [
            "Binary Search",
            "https://leetcode.com/problems/binary-search/",
            704
        ],
        [
            "Search Insert Position",
            "https://leetcode.com/problems/search-insert-position/",
            35
        ],
        [
            "Guess Number Higher Or Lower",
            "https://leetcode.com/problems/guess-number-higher-or-lower/",
            374
        ],
        [
            "Arranging Coins",
            "https://leetcode.com/problems/arranging-coins/",
            441
        ],
        [
            "Squares of a Sorted Array",
            "https://leetcode.com/problems/squares-of-a-sorted-array/",
            977
        ],
        [
            "Valid Perfect Square",
            "https://leetcode.com/problems/valid-perfect-square/",
            367
        ],
        [
            "Search a 2D Matrix",
            "https://leetcode.com/problems/search-a-2d-matrix/",
            74
        ],
        [
            "Koko Eating Bananas",
            "https://leetcode.com/problems/koko-eating-bananas/",
            875
        ],
        [
            "Search In Rotated Sorted Array",
            "https://leetcode.com/problems/search-in-rotated-sorted-array/",
            33
        ],
        [
            "Find Minimum In Rotated Sorted Array",
            "https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/",
            153
        ],
        [
            "Time Based Key Value Store",
            "https://leetcode.com/problems/time-based-key-value-store/",
            981
        ],
        [
            "Find First And Last Position of Element In Sorted Array",
            "https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/",
            34
        ],
        [
            "Maximum Number of Removable Characters",
            "https://leetcode.com/problems/maximum-number-of-removable-characters/",
            1898
        ],
        [
            "Populating Next Right Pointers In Each Node",
            "https://leetcode.com/problems/populating-next-right-pointers-in-each-node/",
            116
        ],
        [
            "Search Suggestions System",
            "https://leetcode.com/problems/search-suggestions-system/",
            1268
        ],
        [
            "Split Array Largest Sum",
            "https://leetcode.com/problems/split-array-largest-sum/",
            410
        ],
        [
            "Median of Two Sorted Arrays",
            "https://leetcode.com/problems/median-of-two-sorted-arrays/",
            4
        ]
    ],
    "Linked List": [
        [
            "Reverse Linked List",
            "https://leetcode.com/problems/reverse-linked-list/",
            206
        ],
        [
            "Merge Two Sorted Lists",
            "https://leetcode.com/problems/merge-two-sorted-lists/",
            21
        ],
        [
            "Palindrome Linked List",
            "https://leetcode.com/problems/palindrome-linked-list/",
            234
        ],
        [
            "Remove Linked List Elements",
            "https://leetcode.com/problems/remove-linked-list-elements/",
            203
        ],
        [
            "Remove Duplicates From Sorted List",
            "https://leetcode.com/problems/remove-duplicates-from-sorted-list/",
            83
        ],
        [
            "Intersection of Two Linked Lists",
            "https://leetcode.com/problems/intersection-of-two-linked-lists/",
            160
        ],
        [
            "Reorder List",
            "https://leetcode.com/problems/reorder-list/",
            143
        ],
        [
            "Remove Nth Node From End of List",
            "https://leetcode.com/problems/remove-nth-node-from-end-of-list/",
            19
        ],
        [
            "Copy List With Random Pointer",
            "https://leetcode.com/problems/copy-list-with-random-pointer/",
            138
        ],
        [
            "Add Two Numbers",
            "https://leetcode.com/problems/add-two-numbers/",
            2
        ],
        [
            "Linked List Cycle",
            "https://leetcode.com/problems/linked-list-cycle/",
            141
        ],
        [
            "Find The Duplicate Number",
            "https://leetcode.com/problems/find-the-duplicate-number/",
            287
        ],
        [
            "Swap Nodes In Pairs",
            "https://leetcode.com/problems/swap-nodes-in-pairs/",
            24
        ],
        [
            "Sort List",
            "https://leetcode.com/problems/sort-list/",
            148
        ],
        [
            "Partition List",
            "https://leetcode.com/problems/partition-list/",
            86
        ],
        [
            "Rotate List",
            "https://leetcode.com/problems/rotate-list/",
            61
        ],
        [
            "Reverse Linked List II",
            "https://leetcode.com/problems/reverse-linked-list-ii/",
            92
        ],
        [
            "Design Circular Queue",
            "https://leetcode.com/problems/design-circular-queue/",
            622
        ],
        [
            "Insertion Sort List",
            "https://leetcode.com/problems/insertion-sort-list/",
            147
        ],
        [
            "LRU Cache",
            "https://leetcode.com/problems/lru-cache/",
            146
        ],
        [
            "Merge K Sorted Lists",
            "https://leetcode.com/problems/merge-k-sorted-lists/",
            23
        ],
        [
            "Reverse Nodes In K Group",
            "https://leetcode.com/problems/reverse-nodes-in-k-group/",
            25
        ]
    ],
    "Trees": [
        [
            "Binary Tree Inorder Traversal",
            "https://leetcode.com/problems/binary-tree-inorder-traversal/",
            94
        ],
        [
            "Invert Binary Tree",
            "https://leetcode.com/problems/invert-binary-tree/",
            226
        ],
        [
            "Maximum Depth of Binary Tree",
            "https://leetcode.com/problems/maximum-depth-of-binary-tree/",
            104
        ],
        [
            "Diameter of Binary Tree",
            "https://leetcode.com/problems/diameter-of-binary-tree/",
            543
        ],
        [
            "Balanced Binary Tree",
            "https://leetcode.com/problems/balanced-binary-tree/",
            110
        ],
        [
            "Same Tree",
            "https://leetcode.com/problems/same-tree/",
            100
        ],
        [
            "Subtree of Another Tree",
            "https://leetcode.com/problems/subtree-of-another-tree/",
            572
        ],
        [
            "Convert Sorted Array to Binary Search Tree",
            "https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/",
            108
        ],
        [
            "Merge Two Binary Trees",
            "https://leetcode.com/problems/merge-two-binary-trees/",
            617
        ],
        [
            "Path Sum",
            "https://leetcode.com/problems/path-sum/",
            112
        ],
        [
            "Construct String From Binary Tree",
            "https://leetcode.com/problems/construct-string-from-binary-tree/",
            606
        ],
        [
            "Lowest Common Ancestor of a Binary Search Tree",
            "https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/",
            235
        ],
        [
            "Binary Tree Level Order Traversal",
            "https://leetcode.com/problems/binary-tree-level-order-traversal/",
            102
        ],
        [
            "Binary Tree Right Side View",
            "https://leetcode.com/problems/binary-tree-right-side-view/",
            199
        ],
        [
            "Count Good Nodes In Binary Tree",
            "https://leetcode.com/problems/count-good-nodes-in-binary-tree/",
            1448
        ],
        [
            "Validate Binary Search Tree",
            "https://leetcode.com/problems/validate-binary-search-tree/",
            98
        ],
        [
            "Kth Smallest Element In a Bst",
            "https://leetcode.com/problems/kth-smallest-element-in-a-bst/",
            230
        ],
        [
            "Construct Binary Tree From Preorder And Inorder Traversal",
            "https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/",
            105
        ],
        [
            "Unique Binary Search Trees",
            "https://leetcode.com/problems/unique-binary-search-trees/",
            96
        ],
        [
            "Sum Root to Leaf Numbers",
            "https://leetcode.com/problems/sum-root-to-leaf-numbers/",
            129
        ],
        [
            "House Robber III",
            "https://leetcode.com/problems/house-robber-iii/",
            337
        ],
        [
            "Flip Equivalent Binary Trees",
            "https://leetcode.com/problems/flip-equivalent-binary-trees/",
            951
        ],
        [
            "Operations On Tree",
            "https://leetcode.com/problems/operations-on-tree/",
            1993
        ],
        [
            "All Possible Full Binary Trees",
            "https://leetcode.com/problems/all-possible-full-binary-trees/",
            894
        ],
        [
            "Find Bottom Left Tree Value",
            "https://leetcode.com/problems/find-bottom-left-tree-value/",
            513
        ],
        [
            "Trim a Binary Search Tree",
            "https://leetcode.com/problems/trim-a-binary-search-tree/",
            669
        ],
        [
            "Binary Search Tree Iterator",
            "https://leetcode.com/problems/binary-search-tree-iterator/",
            173
        ],
        [
            "Convert Bst to Greater Tree",
            "https://leetcode.com/problems/convert-bst-to-greater-tree/",
            538
        ],
        [
            "Binary Tree Maximum Path Sum",
            "https://leetcode.com/problems/binary-tree-maximum-path-sum/",
            124
        ],
        [
            "Serialize And Deserialize Binary Tree",
            "https://leetcode.com/problems/serialize-and-deserialize-binary-tree/",
            297
        ]
    ],
    "Tries": [
        [
            "Implement Trie Prefix Tree",
            "https://leetcode.com/problems/implement-trie-prefix-tree/",
            208
        ],
        [
            "Design Add And Search Words Data Structure",
            "https://leetcode.com/problems/design-add-and-search-words-data-structure/",
            211
        ],
        [
            "Word Search II",
            "https://leetcode.com/problems/word-search-ii/",
            212
        ]
    ],
    "Heap / Priority Queue": [
        [
            "Kth Largest Element In a Stream",
            "https://leetcode.com/problems/kth-largest-element-in-a-stream/",
            703
        ],
        [
            "Last Stone Weight",
            "https://leetcode.com/problems/last-stone-weight/",
            1046
        ],
        [
            "K Closest Points to Origin",
            "https://leetcode.com/problems/k-closest-points-to-origin/",
            973
        ],
        [
            "Kth Largest Element In An Array",
            "https://leetcode.com/problems/kth-largest-element-in-an-array/",
            215
        ],
        [
            "Task Scheduler",
            "https://leetcode.com/problems/task-scheduler/",
            621
        ],
        [
            "Design Twitter",
            "https://leetcode.com/problems/design-twitter/",
            355
        ],
        [
            "Single Threaded Cpu",
            "https://leetcode.com/problems/single-threaded-cpu/",
            1834
        ],
        [
            "Seat Reservation Manager",
            "https://leetcode.com/problems/seat-reservation-manager/",
            1845
        ],
        [
            "Process Tasks Using Servers",
            "https://leetcode.com/problems/process-tasks-using-servers/",
            1882
        ],
        [
            "Find The Kth Largest Integer In The Array",
            "https://leetcode.com/problems/find-the-kth-largest-integer-in-the-array/",
            1985
        ],
        [
            "Reorganize String",
            "https://leetcode.com/problems/reorganize-string/",
            767
        ],
        [
            "Longest Happy String",
            "https://leetcode.com/problems/longest-happy-string/",
            1405
        ],
        [
            "Car Pooling",
            "https://leetcode.com/problems/car-pooling/",
            1094
        ],
        [
            "Find Median From Data Stream",
            "https://leetcode.com/problems/find-median-from-data-stream/",
            295
        ],
        [
            "Maximum Performance of a Team",
            "https://leetcode.com/problems/maximum-performance-of-a-team/",
            1383
        ]
    ],
    "Backtracking": [
        [
            "Subsets",
            "https://leetcode.com/problems/subsets/",
            78
        ],
        [
            "Combination Sum",
            "https://leetcode.com/problems/combination-sum/",
            39
        ],
        [
            "Combinations",
            "https://leetcode.com/problems/combinations/",
            77
        ],
        [
            "Permutations",
            "https://leetcode.com/problems/permutations/",
            46
        ],
        [
            "Subsets II",
            "https://leetcode.com/problems/subsets-ii/",
            90
        ],
        [
            "Combination Sum II",
            "https://leetcode.com/problems/combination-sum-ii/",
            40
        ],
        [
            "Permutations II",
            "https://leetcode.com/problems/permutations-ii/",
            47
        ],
        [
            "Word Search",
            "https://leetcode.com/problems/word-search/",
            79
        ],
        [
            "Palindrome Partitioning",
            "https://leetcode.com/problems/palindrome-partitioning/",
            131
        ],
        [
            "Restore Ip Addresses",
            "https://leetcode.com/problems/restore-ip-addresses/",
            93
        ],
        [
            "Letter Combinations of a Phone Number",
            "https://leetcode.com/problems/letter-combinations-of-a-phone-number/",
            17
        ],
        [
            "Matchsticks to Square",
            "https://leetcode.com/problems/matchsticks-to-square/",
            473
        ],
        [
            "Splitting a String Into Descending Consecutive Values",
            "https://leetcode.com/problems/splitting-a-string-into-descending-consecutive-values/",
            1849
        ],
        [
            "Find Unique Binary String",
            "https://leetcode.com/problems/find-unique-binary-string/",
            1980
        ],
        [
            "Maximum Length of a Concatenated String With Unique Characters",
            "https://leetcode.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters/",
            1239
        ],
        [
            "Partition to K Equal Sum Subsets",
            "https://leetcode.com/problems/partition-to-k-equal-sum-subsets/",
            698
        ],
        [
            "N Queens",
            "https://leetcode.com/problems/n-queens/",
            51
        ],
        [
            "N Queens II",
            "https://leetcode.com/problems/n-queens-ii/",
            52
        ]
    ],
    "Graphs": [
        [
            "Island Perimeter",
            "https://leetcode.com/problems/island-perimeter/",
            463
        ],
        [
            "Verifying An Alien Dictionary",
            "https://leetcode.com/problems/verifying-an-alien-dictionary/",
            953
        ],
        [
            "Number of Islands",
            "https://leetcode.com/problems/number-of-islands/",
            200
        ],
        [
            "Clone Graph",
            "https://leetcode.com/problems/clone-graph/",
            133
        ],
        [
            "Max Area of Island",
            "https://leetcode.com/problems/max-area-of-island/",
            695
        ],
        [
            "Count Sub Islands",
            "https://leetcode.com/problems/count-sub-islands/",
            1905
        ],
        [
            "Pacific Atlantic Water Flow",
            "https://leetcode.com/problems/pacific-atlantic-water-flow/",
            417
        ],
        [
            "Surrounded Regions",
            "https://leetcode.com/problems/surrounded-regions/",
            130
        ],
        [
            "Reorder Routes to Make All Paths Lead to The City Zero",
            "https://leetcode.com/problems/reorder-routes-to-make-all-paths-lead-to-the-city-zero/",
            1466
        ],
        [
            "Rotting Oranges",
            "https://leetcode.com/problems/rotting-oranges/",
            994
        ],
        [
            "Walls And Gates",
            "https://leetcode.com/problems/walls-and-gates/",
            286
        ],
        [
            "Snakes And Ladders",
            "https://leetcode.com/problems/snakes-and-ladders/",
            909
        ],
        [
            "Open The Lock",
            "https://leetcode.com/problems/open-the-lock/",
            752
        ],
        [
            "Find Eventual Safe States",
            "https://leetcode.com/problems/find-eventual-safe-states/",
            802
        ],
        [
            "Course Schedule",
            "https://leetcode.com/problems/course-schedule/",
            207
        ],
        [
            "Course Schedule II",
            "https://leetcode.com/problems/course-schedule-ii/",
            210
        ],
        [
            "Check if Move Is Legal",
            "https://leetcode.com/problems/check-if-move-is-legal/",
            1958
        ],
        [
            "Shortest Bridge",
            "https://leetcode.com/problems/shortest-bridge/",
            934
        ],
        [
            "Redundant Connection",
            "https://leetcode.com/problems/redundant-connection/",
            684
        ],
        [
            "Number of Connected Components In An Undirected Graph",
            "https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/",
            323
        ],
        [
            "Graph Valid Tree",
            "https://leetcode.com/problems/graph-valid-tree/",
            261
        ],
        [
            "Minimum Number of Days to Eat N Oranges",
            "https://leetcode.com/problems/minimum-number-of-days-to-eat-n-oranges/",
            1553
        ],
        [
            "Word Ladder",
            "https://leetcode.com/problems/word-ladder/",
            127
        ]
    ],
    "Advanced Graphs": [
        [
            "Reconstruct Itinerary",
            "https://leetcode.com/problems/reconstruct-itinerary/",
            332
        ],
        [
            "Min Cost to Connect All Points",
            "https://leetcode.com/problems/min-cost-to-connect-all-points/",
            1584
        ],
        [
            "Network Delay Time",
            "https://leetcode.com/problems/network-delay-time/",
            743
        ],
        [
            "Swim In Rising Water",
            "https://leetcode.com/problems/swim-in-rising-water/",
            778
        ],
        [
            "Alien Dictionary",
            "https://leetcode.com/problems/alien-dictionary/",
            269
        ],
        [
            "Cheapest Flights Within K Stops",
            "https://leetcode.com/problems/cheapest-flights-within-k-stops/",
            787
        ]
    ],
    "1-D Dynamic Programming": [
        [
            "Climbing Stairs",
            "https://leetcode.com/problems/climbing-stairs/",
            70
        ],
        [
            "Min Cost Climbing Stairs",
            "https://leetcode.com/problems/min-cost-climbing-stairs/",
            746
        ],
        [
            "House Robber",
            "https://leetcode.com/problems/house-robber/",
            198
        ],
        [
            "House Robber II",
            "https://leetcode.com/problems/house-robber-ii/",
            213
        ],
        [
            "Longest Palindromic Substring",
            "https://leetcode.com/problems/longest-palindromic-substring/",
            5
        ],
        [
            "Palindromic Substrings",
            "https://leetcode.com/problems/palindromic-substrings/",
            647
        ],
        [
            "Decode Ways",
            "https://leetcode.com/problems/decode-ways/",
            91
        ],
        [
            "Coin Change",
            "https://leetcode.com/problems/coin-change/",
            322
        ],
        [
            "Maximum Product Subarray",
            "https://leetcode.com/problems/maximum-product-subarray/",
            152
        ],
        [
            "Word Break",
            "https://leetcode.com/problems/word-break/",
            139
        ],
        [
            "Longest Increasing Subsequence",
            "https://leetcode.com/problems/longest-increasing-subsequence/",
            300
        ],
        [
            "Partition Equal Subset Sum",
            "https://leetcode.com/problems/partition-equal-subset-sum/",
            416
        ],
        [
            "Triangle",
            "https://leetcode.com/problems/triangle/",
            120
        ],
        [
            "Delete And Earn",
            "https://leetcode.com/problems/delete-and-earn/",
            740
        ],
        [
            "Paint House",
            "https://leetcode.com/problems/paint-house/",
            256
        ],
        [
            "Combination Sum IV",
            "https://leetcode.com/problems/combination-sum-iv/",
            377
        ],
        [
            "Perfect Squares",
            "https://leetcode.com/problems/perfect-squares/",
            279
        ],
        [
            "Maximum Subarray Min Product",
            "https://leetcode.com/problems/maximum-subarray-min-product/",
            1856
        ],
        [
            "Minimum Cost For Tickets",
            "https://leetcode.com/problems/minimum-cost-for-tickets/",
            983
        ],
        [
            "Integer Break",
            "https://leetcode.com/problems/integer-break/",
            343
        ],
        [
            "Number of Longest Increasing Subsequence",
            "https://leetcode.com/problems/number-of-longest-increasing-subsequence/",
            673
        ],
        [
            "Stickers to Spell Word",
            "https://leetcode.com/problems/stickers-to-spell-word/",
            691
        ]
    ],
    "2-D Dynamic Programming": [
        [
            "Unique Paths",
            "https://leetcode.com/problems/unique-paths/",
            62
        ],
        [
            "Longest Common Subsequence",
            "https://leetcode.com/problems/longest-common-subsequence/",
            1143
        ],
        [
            "Best Time to Buy And Sell Stock With Cooldown",
            "https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/",
            309
        ],
        [
            "Coin Change II",
            "https://leetcode.com/problems/coin-change-ii/",
            518
        ],
        [
            "Target Sum",
            "https://leetcode.com/problems/target-sum/",
            494
        ],
        [
            "Interleaving String",
            "https://leetcode.com/problems/interleaving-string/",
            97
        ],
        [
            "Stone Game",
            "https://leetcode.com/problems/stone-game/",
            877
        ],
        [
            "Minimum Path Sum",
            "https://leetcode.com/problems/minimum-path-sum/",
            64
        ],
        [
            "Longest Increasing Path In a Matrix",
            "https://leetcode.com/problems/longest-increasing-path-in-a-matrix/",
            329
        ],
        [
            "Maximal Square",
            "https://leetcode.com/problems/maximal-square/",
            221
        ],
        [
            "Maximum Alternating Subsequence Sum",
            "https://leetcode.com/problems/maximum-alternating-subsequence-sum/",
            5782
        ],
        [
            "Distinct Subsequences",
            "https://leetcode.com/problems/distinct-subsequences/",
            115
        ],
        [
            "Edit Distance",
            "https://leetcode.com/problems/edit-distance/",
            72
        ],
        [
            "Count Vowels Permutation",
            "https://leetcode.com/problems/count-vowels-permutation/",
            1220
        ],
        [
            "Burst Balloons",
            "https://leetcode.com/problems/burst-balloons/",
            312
        ],
        [
            "Number of Ways to Rearrange Sticks With K Sticks Visible",
            "https://leetcode.com/problems/number-of-ways-to-rearrange-sticks-with-k-sticks-visible/",
            1866
        ],
        [
            "Regular Expression Matching",
            "https://leetcode.com/problems/regular-expression-matching/",
            10
        ]
    ],
    "Greedy": [
        [
            "Maximum Subarray",
            "https://leetcode.com/problems/maximum-subarray/",
            53
        ],
        [
            "Jump Game",
            "https://leetcode.com/problems/jump-game/",
            55
        ],
        [
            "Jump Game II",
            "https://leetcode.com/problems/jump-game-ii/",
            45
        ],
        [
            "Jump Game VII",
            "https://leetcode.com/problems/jump-game-vii/",
            1871
        ],
        [
            "Gas Station",
            "https://leetcode.com/problems/gas-station/",
            134
        ],
        [
            "Hand of Straights",
            "https://leetcode.com/problems/hand-of-straights/",
            846
        ],
        [
            "Maximum Points You Can Obtain From Cards",
            "https://leetcode.com/problems/maximum-points-you-can-obtain-from-cards/",
            1423
        ],
        [
            "Merge Triplets to Form Target Triplet",
            "https://leetcode.com/problems/merge-triplets-to-form-target-triplet/",
            1898
        ],
        [
            "Partition Labels",
            "https://leetcode.com/problems/partition-labels/",
            763
        ],
        [
            "Valid Parenthesis String",
            "https://leetcode.com/problems/valid-parenthesis-string/",
            678
        ],
        [
            "Eliminate Maximum Number of Monsters",
            "https://leetcode.com/problems/eliminate-maximum-number-of-monsters/",
            1921
        ],
        [
            "Two City Scheduling",
            "https://leetcode.com/problems/two-city-scheduling/",
            1029
        ]
    ],
    "Intervals": [
        [
            "Insert Interval",
            "https://leetcode.com/problems/insert-interval/",
            57
        ],
        [
            "Merge Intervals",
            "https://leetcode.com/problems/merge-intervals/",
            56
        ],
        [
            "Non Overlapping Intervals",
            "https://leetcode.com/problems/non-overlapping-intervals/",
            435
        ],
        [
            "Meeting Rooms",
            "https://leetcode.com/problems/meeting-rooms/",
            253
        ],
        [
            "Meeting Rooms II",
            "https://leetcode.com/problems/meeting-rooms-ii/",
            919
        ],
        [
            "Remove Covered Intervals",
            "https://leetcode.com/problems/remove-covered-intervals/",
            1288
        ],
        [
            "Minimum Interval to Include Each Query",
            "https://leetcode.com/problems/minimum-interval-to-include-each-query/",
            1851
        ]
    ],
    "Math & Geometry": [
        [
            "Rotate Image",
            "https://leetcode.com/problems/rotate-image/",
            48
        ],
        [
            "Spiral Matrix",
            "https://leetcode.com/problems/spiral-matrix/",
            54
        ],
        [
            "Set Matrix Zeroes",
            "https://leetcode.com/problems/set-matrix-zeroes/",
            73
        ],
        [
            "Happy Number",
            "https://leetcode.com/problems/happy-number/",
            202
        ],
        [
            "Plus One",
            "https://leetcode.com/problems/plus-one/",
            66
        ],
        [
            "Palindrome Number",
            "https://leetcode.com/problems/palindrome-number/",
            9
        ],
        [
            "Ugly Number",
            "https://leetcode.com/problems/ugly-number/",
            263
        ],
        [
            "Shift 2D Grid",
            "https://leetcode.com/problems/shift-2d-grid/",
            1260
        ],
        [
            "Roman to Integer",
            "https://leetcode.com/problems/roman-to-integer/",
            13
        ],
        [
            "Integer to Roman",
            "https://leetcode.com/problems/integer-to-roman/",
            12
        ],
        [
            "Pow(x, n)",
            "https://leetcode.com/problems/powx-n/",
            50
        ],
        [
            "Multiply Strings",
            "https://leetcode.com/problems/multiply-strings/",
            43
        ],
        [
            "Detect Squares",
            "https://leetcode.com/problems/detect-squares/",
            2013
        ],
        [
            "Robot Bounded In Circle",
            "https://leetcode.com/problems/robot-bounded-in-circle/",
            1041
        ],
        [
            "Zigzag Conversion",
            "https://leetcode.com/problems/zigzag-conversion/",
            6
        ],
        [
            "Find Missing Observations",
            "https://leetcode.com/problems/find-missing-observations/",
            2028
        ]
    ],
    "Bit Manipulation": [
        [
            "Single Number",
            "https://leetcode.com/problems/single-number/",
            136
        ],
        [
            "Number of 1 Bits",
            "https://leetcode.com/problems/number-of-1-bits/",
            191
        ],
        [
            "Counting Bits",
            "https://leetcode.com/problems/counting-bits/",
            338
        ],
        [
            "Reverse Bits",
            "https://leetcode.com/problems/reverse-bits/",
            190
        ],
        [
            "Missing Number",
            "https://leetcode.com/problems/missing-number/",
            268
        ],
        [
            "Sum of Two Integers",
            "https://leetcode.com/problems/sum-of-two-integers/",
            371
        ],
        [
            "Reverse Integer",
            "https://leetcode.com/problems/reverse-integer/",
            7
        ],
        [
            "Add Binary",
            "https://leetcode.com/problems/add-binary/",
            67
        ]
    ]
}