.problemList.json

{
    "Arrays & Hashing":[
       [
          "Contains Duplicate",
          "https://leetcode.com/problems/contains-duplicate/",
          "0217"
       ],
       [
          "Valid Anagram",
          "https://leetcode.com/problems/valid-anagram/",
          "0242"
       ],
       [
          "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/",
          "0392"
       ],
       [
          "Length of Last Word",
          "https://leetcode.com/problems/length-of-last-word/",
          "0058"
       ],
       [
          "Two Sum",
          "https://leetcode.com/problems/two-sum/",
          "0001"
       ],
       [
          "Longest Common Prefix",
          "https://leetcode.com/problems/longest-common-prefix/",
          "0014"
       ],
       [
          "Group Anagrams",
          "https://leetcode.com/problems/group-anagrams/",
          "0049"
       ],
       [
          "Pascals Triangle",
          "https://leetcode.com/problems/pascals-triangle/",
          "0118"
       ],
       [
          "Remove Element",
          "https://leetcode.com/problems/remove-element/",
          "0027"
       ],
       [
          "Unique Email Addresses",
          "https://leetcode.com/problems/unique-email-addresses/",
          "0929"
       ],
       [
          "Isomorphic Strings",
          "https://leetcode.com/problems/isomorphic-strings/",
          "0205"
       ],
       [
          "Can Place Flowers",
          "https://leetcode.com/problems/can-place-flowers/",
          "0605"
       ],
       [
          "Majority Element",
          "https://leetcode.com/problems/majority-element/",
          "0169"
       ],
       [
          "Next Greater Element I",
          "https://leetcode.com/problems/next-greater-element-i/",
          "0496"
       ],
       [
          "Find Pivot Index",
          "https://leetcode.com/problems/find-pivot-index/",
          "0724"
       ],
       [
          "Find All Numbers Disappeared In An Array",
          "https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/",
          "0448"
       ],
       [
          "Maximum Number of Balloons",
          "https://leetcode.com/problems/maximum-number-of-balloons/",
          "1189"
       ],
       [
          "Word Pattern",
          "https://leetcode.com/problems/word-pattern/",
          "0290"
       ],
       [
          "Top K Frequent Elements",
          "https://leetcode.com/problems/top-k-frequent-elements/",
          "0347"
       ],
       [
          "Product of Array Except Self",
          "https://leetcode.com/problems/product-of-array-except-self/",
          "0238"
       ],
       [
          "Valid Sudoku",
          "https://leetcode.com/problems/valid-sudoku/",
          "0036"
       ],
       [
          "Encode And Decode Strings",
          "https://leetcode.com/problems/encode-and-decode-strings/",
          "0271"
       ],
       [
          "Longest Consecutive Sequence",
          "https://leetcode.com/problems/longest-consecutive-sequence/",
          "0128"
       ],
       [
          "Sort Colors",
          "https://leetcode.com/problems/sort-colors/",
          "0075"
       ],
       [
          "Encode And Decode Tinyurl",
          "https://leetcode.com/problems/encode-and-decode-tinyurl/",
          "0535"
       ],
       [
          "Brick Wall",
          "https://leetcode.com/problems/brick-wall/",
          "0554"
       ],
       [
          "Best Time to Buy And Sell Stock II",
          "https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/",
          "0122"
       ],
       [
          "Subarray Sum Equals K",
          "https://leetcode.com/problems/subarray-sum-equals-k/",
          "0560"
       ],
       [
          "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/",
          "0438"
       ],
       [
          "Find The Index of The First Occurrence In a String",
          "https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/",
          "0028"
       ],
       [
          "Wiggle Sort",
          "https://leetcode.com/problems/wiggle-sort/",
          "0280"
       ],
       [
          "Largest Number",
          "https://leetcode.com/problems/largest-number/",
          "0179"
       ],
       [
          "Continuous Subarray Sum",
          "https://leetcode.com/problems/continuous-subarray-sum/",
          "0523"
       ],
       [
          "Push Dominoes",
          "https://leetcode.com/problems/push-dominoes/",
          "0838"
       ],
       [
          "Repeated Dna Sequences",
          "https://leetcode.com/problems/repeated-dna-sequences/",
          "0187"
       ],
       [
          "Insert Delete Get Random O(1)",
          "https://leetcode.com/problems/insert-delete-getrandom-o1/",
          "0380"
       ],
       [
          "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/",
          "0304"
       ],
       [
          "Non Decreasing Array",
          "https://leetcode.com/problems/non-decreasing-array/",
          "0665"
       ],
       [
          "First Missing Positive",
          "https://leetcode.com/problems/first-missing-positive/",
          "0041"
       ]
    ],
    "Two Pointers":[
       [
          "Valid Palindrome",
          "https://leetcode.com/problems/valid-palindrome/",
          "0125"
       ],
       [
          "Valid Palindrome II",
          "https://leetcode.com/problems/valid-palindrome-ii/",
          "0680"
       ],
       [
          "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/",
          "0344"
       ],
       [
          "Merge Sorted Array",
          "https://leetcode.com/problems/merge-sorted-array/",
          "0088"
       ],
       [
          "Move Zeroes",
          "https://leetcode.com/problems/move-zeroes/",
          "0283"
       ],
       [
          "Remove Duplicates From Sorted Array",
          "https://leetcode.com/problems/remove-duplicates-from-sorted-array/",
          "0026"
       ],
       [
          "Two Sum II Input Array Is Sorted",
          "https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/",
          "0167"
       ],
       [
          "3Sum",
          "https://leetcode.com/problems/3sum/",
          "0015"
       ],
       [
          "4Sum",
          "https://leetcode.com/problems/4sum/",
          "0018"
       ],
       [
          "Container With Most Water",
          "https://leetcode.com/problems/container-with-most-water/",
          "0011"
       ],
       [
          "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/",
          "0189"
       ],
       [
          "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/",
          "0881"
       ],
       [
          "Trapping Rain Water",
          "https://leetcode.com/problems/trapping-rain-water/",
          "0042"
       ]
    ],
    "Sliding Window":[
       [
          "Best Time to Buy And Sell Stock",
          "https://leetcode.com/problems/best-time-to-buy-and-sell-stock/",
          "0121"
       ],
       [
          "Longest Substring Without Repeating Characters",
          "https://leetcode.com/problems/longest-substring-without-repeating-characters/",
          "0003"
       ],
       [
          "Longest Repeating Character Replacement",
          "https://leetcode.com/problems/longest-repeating-character-replacement/",
          "0424"
       ],
       [
          "Permutation In String",
          "https://leetcode.com/problems/permutation-in-string/",
          "0567"
       ],
       [
          "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/",
          "0209"
       ],
       [
          "Find K Closest Elements",
          "https://leetcode.com/problems/find-k-closest-elements/",
          "0658"
       ],
       [
          "Minimum Window Substring",
          "https://leetcode.com/problems/minimum-window-substring/",
          "0076"
       ],
       [
          "Sliding Window Maximum",
          "https://leetcode.com/problems/sliding-window-maximum/",
          "0239"
       ]
    ],
    "Stack":[
       [
          "Valid Parentheses",
          "https://leetcode.com/problems/valid-parentheses/",
          "0020"
       ],
       [
          "Baseball Game",
          "https://leetcode.com/problems/baseball-game/",
          "0682"
       ],
       [
          "Implement Stack Using Queues",
          "https://leetcode.com/problems/implement-stack-using-queues/",
          "0225"
       ],
       [
          "Min Stack",
          "https://leetcode.com/problems/min-stack/",
          "0155"
       ],
       [
          "Evaluate Reverse Polish Notation",
          "https://leetcode.com/problems/evaluate-reverse-polish-notation/",
          "0150"
       ],
       [
          "Generate Parentheses",
          "https://leetcode.com/problems/generate-parentheses/",
          "0022"
       ],
       [
          "Asteroid Collision",
          "https://leetcode.com/problems/asteroid-collision/",
          "0735"
       ],
       [
          "Daily Temperatures",
          "https://leetcode.com/problems/daily-temperatures/",
          "0739"
       ],
       [
          "Online Stock Span",
          "https://leetcode.com/problems/online-stock-span/",
          "0901"
       ],
       [
          "Car Fleet",
          "https://leetcode.com/problems/car-fleet/",
          "0853"
       ],
       [
          "Simplify Path",
          "https://leetcode.com/problems/simplify-path/",
          "0071"
       ],
       [
          "Decode String",
          "https://leetcode.com/problems/decode-string/",
          "0394"
       ],
       [
          "Remove K Digits",
          "https://leetcode.com/problems/remove-k-digits/",
          "0402"
       ],
       [
          "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/",
          "0132"
       ],
       [
          "Maximum Frequency Stack",
          "https://leetcode.com/problems/maximum-frequency-stack/",
          "0895"
       ],
       [
          "Largest Rectangle In Histogram",
          "https://leetcode.com/problems/largest-rectangle-in-histogram/",
          "0084"
       ]
    ],
    "Binary Search":[
       [
          "Binary Search",
          "https://leetcode.com/problems/binary-search/",
          "0704"
       ],
       [
          "Search Insert Position",
          "https://leetcode.com/problems/search-insert-position/",
          "0035"
       ],
       [
          "Guess Number Higher Or Lower",
          "https://leetcode.com/problems/guess-number-higher-or-lower/",
          "0374"
       ],
       [
          "Arranging Coins",
          "https://leetcode.com/problems/arranging-coins/",
          "0441"
       ],
       [
          "Squares of a Sorted Array",
          "https://leetcode.com/problems/squares-of-a-sorted-array/",
          "0977"
       ],
       [
          "Valid Perfect Square",
          "https://leetcode.com/problems/valid-perfect-square/",
          "0367"
       ],
       [
          "Search a 2D Matrix",
          "https://leetcode.com/problems/search-a-2d-matrix/",
          "0074"
       ],
       [
          "Koko Eating Bananas",
          "https://leetcode.com/problems/koko-eating-bananas/",
          "0875"
       ],
       [
          "Search In Rotated Sorted Array",
          "https://leetcode.com/problems/search-in-rotated-sorted-array/",
          "0033"
       ],
       [
          "Find Minimum In Rotated Sorted Array",
          "https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/",
          "0153"
       ],
       [
          "Time Based Key Value Store",
          "https://leetcode.com/problems/time-based-key-value-store/",
          "0981"
       ],
       [
          "Find First And Last Position of Element In Sorted Array",
          "https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/",
          "0034"
       ],
       [
          "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/",
          "0116"
       ],
       [
          "Search Suggestions System",
          "https://leetcode.com/problems/search-suggestions-system/",
          "1268"
       ],
       [
          "Split Array Largest Sum",
          "https://leetcode.com/problems/split-array-largest-sum/",
          "0410"
       ],
       [
          "Median of Two Sorted Arrays",
          "https://leetcode.com/problems/median-of-two-sorted-arrays/",
          "0004"
       ]
    ],
    "Linked List":[
       [
          "Reverse Linked List",
          "https://leetcode.com/problems/reverse-linked-list/",
          "0206"
       ],
       [
          "Merge Two Sorted Lists",
          "https://leetcode.com/problems/merge-two-sorted-lists/",
          "0021"
       ],
       [
          "Palindrome Linked List",
          "https://leetcode.com/problems/palindrome-linked-list/",
          "0234"
       ],
       [
          "Remove Linked List Elements",
          "https://leetcode.com/problems/remove-linked-list-elements/",
          "0203"
       ],
       [
          "Remove Duplicates From Sorted List",
          "https://leetcode.com/problems/remove-duplicates-from-sorted-list/",
          "0083"
       ],
       [
          "Intersection of Two Linked Lists",
          "https://leetcode.com/problems/intersection-of-two-linked-lists/",
          "0160"
       ],
       [
          "Reorder List",
          "https://leetcode.com/problems/reorder-list/",
          "0143"
       ],
       [
          "Remove Nth Node From End of List",
          "https://leetcode.com/problems/remove-nth-node-from-end-of-list/",
          "0019"
       ],
       [
          "Copy List With Random Pointer",
          "https://leetcode.com/problems/copy-list-with-random-pointer/",
          "0138"
       ],
       [
          "Add Two Numbers",
          "https://leetcode.com/problems/add-two-numbers/",
          "0002"
       ],
       [
          "Linked List Cycle",
          "https://leetcode.com/problems/linked-list-cycle/",
          "0141"
       ],
       [
          "Find The Duplicate Number",
          "https://leetcode.com/problems/find-the-duplicate-number/",
          "0287"
       ],
       [
          "Swap Nodes In Pairs",
          "https://leetcode.com/problems/swap-nodes-in-pairs/",
          "0024"
       ],
       [
          "Sort List",
          "https://leetcode.com/problems/sort-list/",
          "0148"
       ],
       [
          "Partition List",
          "https://leetcode.com/problems/partition-list/",
          "0086"
       ],
       [
          "Rotate List",
          "https://leetcode.com/problems/rotate-list/",
          "0061"
       ],
       [
          "Reverse Linked List II",
          "https://leetcode.com/problems/reverse-linked-list-ii/",
          "0092"
       ],
       [
          "Design Circular Queue",
          "https://leetcode.com/problems/design-circular-queue/",
          "0622"
       ],
       [
          "Insertion Sort List",
          "https://leetcode.com/problems/insertion-sort-list/",
          "0147"
       ],
       [
          "LRU Cache",
          "https://leetcode.com/problems/lru-cache/",
          "0146"
       ],
       [
          "Merge K Sorted Lists",
          "https://leetcode.com/problems/merge-k-sorted-lists/",
          "0023"
       ],
       [
          "Reverse Nodes In K Group",
          "https://leetcode.com/problems/reverse-nodes-in-k-group/",
          "0025"
       ]
    ],
    "Trees":[
       [
          "Binary Tree Inorder Traversal",
          "https://leetcode.com/problems/binary-tree-inorder-traversal/",
          "0094"
       ],
       [
          "Invert Binary Tree",
          "https://leetcode.com/problems/invert-binary-tree/",
          "0226"
       ],
       [
          "Maximum Depth of Binary Tree",
          "https://leetcode.com/problems/maximum-depth-of-binary-tree/",
          "0104"
       ],
       [
          "Diameter of Binary Tree",
          "https://leetcode.com/problems/diameter-of-binary-tree/",
          "0543"
       ],
       [
          "Balanced Binary Tree",
          "https://leetcode.com/problems/balanced-binary-tree/",
          "0110"
       ],
       [
          "Same Tree",
          "https://leetcode.com/problems/same-tree/",
          "0100"
       ],
       [
          "Subtree of Another Tree",
          "https://leetcode.com/problems/subtree-of-another-tree/",
          "0572"
       ],
       [
          "Convert Sorted Array to Binary Search Tree",
          "https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/",
          "0108"
       ],
       [
          "Merge Two Binary Trees",
          "https://leetcode.com/problems/merge-two-binary-trees/",
          "0617"
       ],
       [
          "Path Sum",
          "https://leetcode.com/problems/path-sum/",
          "0112"
       ],
       [
          "Construct String From Binary Tree",
          "https://leetcode.com/problems/construct-string-from-binary-tree/",
          "0606"
       ],
       [
          "Lowest Common Ancestor of a Binary Search Tree",
          "https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/",
          "0235"
       ],
       [
          "Binary Tree Level Order Traversal",
          "https://leetcode.com/problems/binary-tree-level-order-traversal/",
          "0102"
       ],
       [
          "Binary Tree Right Side View",
          "https://leetcode.com/problems/binary-tree-right-side-view/",
          "0199"
       ],
       [
          "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/",
          "0098"
       ],
       [
          "Kth Smallest Element In a Bst",
          "https://leetcode.com/problems/kth-smallest-element-in-a-bst/",
          "0230"
       ],
       [
          "Construct Binary Tree From Preorder And Inorder Traversal",
          "https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/",
          "0105"
       ],
       [
          "Unique Binary Search Trees",
          "https://leetcode.com/problems/unique-binary-search-trees/",
          "0096"
       ],
       [
          "Sum Root to Leaf Numbers",
          "https://leetcode.com/problems/sum-root-to-leaf-numbers/",
          "0129"
       ],
       [
          "House Robber III",
          "https://leetcode.com/problems/house-robber-iii/",
          "0337"
       ],
       [
          "Flip Equivalent Binary Trees",
          "https://leetcode.com/problems/flip-equivalent-binary-trees/",
          "0951"
       ],
       [
          "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/",
          "0894"
       ],
       [
          "Find Bottom Left Tree Value",
          "https://leetcode.com/problems/find-bottom-left-tree-value/",
          "0513"
       ],
       [
          "Trim a Binary Search Tree",
          "https://leetcode.com/problems/trim-a-binary-search-tree/",
          "0669"
       ],
       [
          "Binary Search Tree Iterator",
          "https://leetcode.com/problems/binary-search-tree-iterator/",
          "0173"
       ],
       [
          "Convert Bst to Greater Tree",
          "https://leetcode.com/problems/convert-bst-to-greater-tree/",
          "0538"
       ],
       [
          "Binary Tree Maximum Path Sum",
          "https://leetcode.com/problems/binary-tree-maximum-path-sum/",
          "0124"
       ],
       [
          "Serialize And Deserialize Binary Tree",
          "https://leetcode.com/problems/serialize-and-deserialize-binary-tree/",
          "0297"
       ]
    ],
    "Tries":[
       [
          "Implement Trie Prefix Tree",
          "https://leetcode.com/problems/implement-trie-prefix-tree/",
          "0208"
       ],
       [
          "Design Add And Search Words Data Structure",
          "https://leetcode.com/problems/design-add-and-search-words-data-structure/",
          "0211"
       ],
       [
          "Word Search II",
          "https://leetcode.com/problems/word-search-ii/",
          "0212"
       ]
    ],
    "Heap / Priority Queue":[
       [
          "Kth Largest Element In a Stream",
          "https://leetcode.com/problems/kth-largest-element-in-a-stream/",
          "0703"
       ],
       [
          "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/",
          "0973"
       ],
       [
          "Kth Largest Element In An Array",
          "https://leetcode.com/problems/kth-largest-element-in-an-array/",
          "0215"
       ],
       [
          "Task Scheduler",
          "https://leetcode.com/problems/task-scheduler/",
          "0621"
       ],
       [
          "Design Twitter",
          "https://leetcode.com/problems/design-twitter/",
          "0355"
       ],
       [
          "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/",
          "0767"
       ],
       [
          "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/",
          "0295"
       ],
       [
          "Maximum Performance of a Team",
          "https://leetcode.com/problems/maximum-performance-of-a-team/",
          "1383"
       ]
    ],
    "Backtracking":[
       [
          "Subsets",
          "https://leetcode.com/problems/subsets/",
          "0078"
       ],
       [
          "Combination Sum",
          "https://leetcode.com/problems/combination-sum/",
          "0039"
       ],
       [
          "Combinations",
          "https://leetcode.com/problems/combinations/",
          "0077"
       ],
       [
          "Permutations",
          "https://leetcode.com/problems/permutations/",
          "0046"
       ],
       [
          "Subsets II",
          "https://leetcode.com/problems/subsets-ii/",
          "0090"
       ],
       [
          "Combination Sum II",
          "https://leetcode.com/problems/combination-sum-ii/",
          "0040"
       ],
       [
          "Permutations II",
          "https://leetcode.com/problems/permutations-ii/",
          "0047"
       ],
       [
          "Word Search",
          "https://leetcode.com/problems/word-search/",
          "0079"
       ],
       [
          "Palindrome Partitioning",
          "https://leetcode.com/problems/palindrome-partitioning/",
          "0131"
       ],
       [
          "Restore Ip Addresses",
          "https://leetcode.com/problems/restore-ip-addresses/",
          "0093"
       ],
       [
          "Letter Combinations of a Phone Number",
          "https://leetcode.com/problems/letter-combinations-of-a-phone-number/",
          "0017"
       ],
       [
          "Matchsticks to Square",
          "https://leetcode.com/problems/matchsticks-to-square/",
          "0473"
       ],
       [
          "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/",
          "0698"
       ],
       [
          "N Queens",
          "https://leetcode.com/problems/n-queens/",
          "0051"
       ],
       [
          "N Queens II",
          "https://leetcode.com/problems/n-queens-ii/",
          "0052"
       ]
    ],
    "Graphs":[
       [
          "Island Perimeter",
          "https://leetcode.com/problems/island-perimeter/",
          "0463"
       ],
       [
          "Verifying An Alien Dictionary",
          "https://leetcode.com/problems/verifying-an-alien-dictionary/",
          "0953"
       ],
       [
          "Number of Islands",
          "https://leetcode.com/problems/number-of-islands/",
          "0200"
       ],
       [
          "Clone Graph",
          "https://leetcode.com/problems/clone-graph/",
          "0133"
       ],
       [
          "Max Area of Island",
          "https://leetcode.com/problems/max-area-of-island/",
          "0695"
       ],
       [
          "Count Sub Islands",
          "https://leetcode.com/problems/count-sub-islands/",
          "1905"
       ],
       [
          "Pacific Atlantic Water Flow",
          "https://leetcode.com/problems/pacific-atlantic-water-flow/",
          "0417"
       ],
       [
          "Surrounded Regions",
          "https://leetcode.com/problems/surrounded-regions/",
          "0130"
       ],
       [
          "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/",
          "0994"
       ],
       [
          "Walls And Gates",
          "https://leetcode.com/problems/walls-and-gates/",
          "0286"
       ],
       [
          "Snakes And Ladders",
          "https://leetcode.com/problems/snakes-and-ladders/",
          "0909"
       ],
       [
          "Open The Lock",
          "https://leetcode.com/problems/open-the-lock/",
          "0752"
       ],
       [
          "Find Eventual Safe States",
          "https://leetcode.com/problems/find-eventual-safe-states/",
          "0802"
       ],
       [
          "Course Schedule",
          "https://leetcode.com/problems/course-schedule/",
          "0207"
       ],
       [
          "Course Schedule II",
          "https://leetcode.com/problems/course-schedule-ii/",
          "0210"
       ],
       [
          "Check if Move Is Legal",
          "https://leetcode.com/problems/check-if-move-is-legal/",
          "1958"
       ],
       [
          "Shortest Bridge",
          "https://leetcode.com/problems/shortest-bridge/",
          "0934"
       ],
       [
          "Redundant Connection",
          "https://leetcode.com/problems/redundant-connection/",
          "0684"
       ],
       [
          "Number of Connected Components In An Undirected Graph",
          "https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/",
          "0323"
       ],
       [
          "Graph Valid Tree",
          "https://leetcode.com/problems/graph-valid-tree/",
          "0261"
       ],
       [
          "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/",
          "0127"
       ]
    ],
    "Advanced Graphs":[
       [
          "Reconstruct Itinerary",
          "https://leetcode.com/problems/reconstruct-itinerary/",
          "0332"
       ],
       [
          "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/",
          "0743"
       ],
       [
          "Swim In Rising Water",
          "https://leetcode.com/problems/swim-in-rising-water/",
          "0778"
       ],
       [
          "Alien Dictionary",
          "https://leetcode.com/problems/alien-dictionary/",
          "0269"
       ],
       [
          "Cheapest Flights Within K Stops",
          "https://leetcode.com/problems/cheapest-flights-within-k-stops/",
          "0787"
       ]
    ],
    "1-D Dynamic Programming":[
       [
          "Climbing Stairs",
          "https://leetcode.com/problems/climbing-stairs/",
          "0070"
       ],
       [
          "Min Cost Climbing Stairs",
          "https://leetcode.com/problems/min-cost-climbing-stairs/",
          "0746"
       ],
       [
          "House Robber",
          "https://leetcode.com/problems/house-robber/",
          "0198"
       ],
       [
          "House Robber II",
          "https://leetcode.com/problems/house-robber-ii/",
          "0213"
       ],
       [
          "Longest Palindromic Substring",
          "https://leetcode.com/problems/longest-palindromic-substring/",
          "0005"
       ],
       [
          "Palindromic Substrings",
          "https://leetcode.com/problems/palindromic-substrings/",
          "0647"
       ],
       [
          "Decode Ways",
          "https://leetcode.com/problems/decode-ways/",
          "0091"
       ],
       [
          "Coin Change",
          "https://leetcode.com/problems/coin-change/",
          "0322"
       ],
       [
          "Maximum Product Subarray",
          "https://leetcode.com/problems/maximum-product-subarray/",
          "0152"
       ],
       [
          "Word Break",
          "https://leetcode.com/problems/word-break/",
          "0139"
       ],
       [
          "Longest Increasing Subsequence",
          "https://leetcode.com/problems/longest-increasing-subsequence/",
          "0300"
       ],
       [
          "Partition Equal Subset Sum",
          "https://leetcode.com/problems/partition-equal-subset-sum/",
          "0416"
       ],
       [
          "Triangle",
          "https://leetcode.com/problems/triangle/",
          "0120"
       ],
       [
          "Delete And Earn",
          "https://leetcode.com/problems/delete-and-earn/",
          "0740"
       ],
       [
          "Paint House",
          "https://leetcode.com/problems/paint-house/",
          "0256"
       ],
       [
          "Combination Sum IV",
          "https://leetcode.com/problems/combination-sum-iv/",
          "0377"
       ],
       [
          "Perfect Squares",
          "https://leetcode.com/problems/perfect-squares/",
          "0279"
       ],
       [
          "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/",
          "0983"
       ],
       [
          "Integer Break",
          "https://leetcode.com/problems/integer-break/",
          "0343"
       ],
       [
          "Number of Longest Increasing Subsequence",
          "https://leetcode.com/problems/number-of-longest-increasing-subsequence/",
          "0673"
       ],
       [
          "Stickers to Spell Word",
          "https://leetcode.com/problems/stickers-to-spell-word/",
          "0691"
       ]
    ],
    "2-D Dynamic Programming":[
       [
          "Unique Paths",
          "https://leetcode.com/problems/unique-paths/",
          "0062"
       ],
       [
          "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/",
          "0309"
       ],
       [
          "Coin Change II",
          "https://leetcode.com/problems/coin-change-ii/",
          "0518"
       ],
       [
          "Target Sum",
          "https://leetcode.com/problems/target-sum/",
          "0494"
       ],
       [
          "Interleaving String",
          "https://leetcode.com/problems/interleaving-string/",
          "0097"
       ],
       [
          "Stone Game",
          "https://leetcode.com/problems/stone-game/",
          "0877"
       ],
       [
          "Minimum Path Sum",
          "https://leetcode.com/problems/minimum-path-sum/",
          "0064"
       ],
       [
          "Longest Increasing Path In a Matrix",
          "https://leetcode.com/problems/longest-increasing-path-in-a-matrix/",
          "0329"
       ],
       [
          "Maximal Square",
          "https://leetcode.com/problems/maximal-square/",
          "0221"
       ],
       [
          "Maximum Alternating Subsequence Sum",
          "https://leetcode.com/problems/maximum-alternating-subsequence-sum/",
          "5782"
       ],
       [
          "Distinct Subsequences",
          "https://leetcode.com/problems/distinct-subsequences/",
          "0115"
       ],
       [
          "Edit Distance",
          "https://leetcode.com/problems/edit-distance/",
          "0072"
       ],
       [
          "Count Vowels Permutation",
          "https://leetcode.com/problems/count-vowels-permutation/",
          "1220"
       ],
       [
          "Burst Balloons",
          "https://leetcode.com/problems/burst-balloons/",
          "0312"
       ],
       [
          "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/",
          "0010"
       ]
    ],
    "Greedy":[
       [
          "Maximum Subarray",
          "https://leetcode.com/problems/maximum-subarray/",
          "0053"
       ],
       [
          "Jump Game",
          "https://leetcode.com/problems/jump-game/",
          "0055"
       ],
       [
          "Jump Game II",
          "https://leetcode.com/problems/jump-game-ii/",
          "0045"
       ],
       [
          "Jump Game VII",
          "https://leetcode.com/problems/jump-game-vii/",
          "1871"
       ],
       [
          "Gas Station",
          "https://leetcode.com/problems/gas-station/",
          "0134"
       ],
       [
          "Hand of Straights",
          "https://leetcode.com/problems/hand-of-straights/",
          "0846"
       ],
       [
          "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/",
          "1899"
       ],
       [
          "Partition Labels",
          "https://leetcode.com/problems/partition-labels/",
          "0763"
       ],
       [
          "Valid Parenthesis String",
          "https://leetcode.com/problems/valid-parenthesis-string/",
          "0678"
       ],
       [
          "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/",
          "0057"
       ],
       [
          "Merge Intervals",
          "https://leetcode.com/problems/merge-intervals/",
          "0056"
       ],
       [
          "Non Overlapping Intervals",
          "https://leetcode.com/problems/non-overlapping-intervals/",
          "0435"
       ],
       [
          "Meeting Rooms",
          "https://leetcode.com/problems/meeting-rooms/",
          "0252"
       ],
       [
          "Meeting Rooms II",
          "https://leetcode.com/problems/meeting-rooms-ii/",
          "0253"
       ],
       [
          "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/",
          "0048"
       ],
       [
          "Spiral Matrix",
          "https://leetcode.com/problems/spiral-matrix/",
          "0054"
       ],
       [
          "Set Matrix Zeroes",
          "https://leetcode.com/problems/set-matrix-zeroes/",
          "0073"
       ],
       [
          "Happy Number",
          "https://leetcode.com/problems/happy-number/",
          "0202"
       ],
       [
          "Plus One",
          "https://leetcode.com/problems/plus-one/",
          "0066"
       ],
       [
          "Palindrome Number",
          "https://leetcode.com/problems/palindrome-number/",
          "0009"
       ],
       [
          "Ugly Number",
          "https://leetcode.com/problems/ugly-number/",
          "0263"
       ],
       [
          "Shift 2D Grid",
          "https://leetcode.com/problems/shift-2d-grid/",
          "1260"
       ],
       [
          "Roman to Integer",
          "https://leetcode.com/problems/roman-to-integer/",
          "0013"
       ],
       [
          "Integer to Roman",
          "https://leetcode.com/problems/integer-to-roman/",
          "0012"
       ],
       [
          "Pow(x, n)",
          "https://leetcode.com/problems/powx-n/",
          "0050"
       ],
       [
          "Multiply Strings",
          "https://leetcode.com/problems/multiply-strings/",
          "0043"
       ],
       [
          "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/",
          "0006"
       ],
       [
          "Find Missing Observations",
          "https://leetcode.com/problems/find-missing-observations/",
          "2028"
       ]
    ],
    "Bit Manipulation":[
       [
          "Single Number",
          "https://leetcode.com/problems/single-number/",
          "0136"
       ],
       [
          "Number of 1 Bits",
          "https://leetcode.com/problems/number-of-1-bits/",
          "0191"
       ],
       [
          "Counting Bits",
          "https://leetcode.com/problems/counting-bits/",
          "0338"
       ],
       [
          "Reverse Bits",
          "https://leetcode.com/problems/reverse-bits/",
          "0190"
       ],
       [
          "Missing Number",
          "https://leetcode.com/problems/missing-number/",
          "0268"
       ],
       [
          "Sum of Two Integers",
          "https://leetcode.com/problems/sum-of-two-integers/",
          "0371"
       ],
       [
          "Reverse Integer",
          "https://leetcode.com/problems/reverse-integer/",
          "0007"
       ],
       [
          "Add Binary",
          "https://leetcode.com/problems/add-binary/",
          "0067"
       ]
    ]
 }