Edit Distance |
Hard |
https://leetcode.com/problems/edit-distance/ |
First Missing Positive |
Hard |
https://leetcode.com/problems/first-missing-positive/ |
Remove Invalid Parentheses |
Hard |
https://leetcode.com/problems/remove-invalid-parentheses/ |
Longest Consecutive Sequence |
Hard |
https://leetcode.com/problems/longest-consecutive-sequence/ |
Minimum Window Substring |
Hard |
https://leetcode.com/problems/minimum-window-substring/ |
Regular Expression Matching |
Hard |
https://leetcode.com/problems/regular-expression-matching/ |
NQueens |
Hard |
https://leetcode.com/problems/n-queens/ |
merge k sorted lists |
Hard |
https://leetcode.com/problems/merge-k-sorted-lists/ |
Set Matrix Zeroes |
Hard |
https://leetcode.com/problems/set-matrix-zeroes/ |
Subarray Sum Equals K |
Medium |
https://leetcode.com/problems/subarray-sum-equals-k/ |
3Sum Closest |
Medium |
https://leetcode.com/problems/3sum-closest/ |
3Sum |
Medium |
https://leetcode.com/problems/3sum/ |
NumberOfIslands |
Medium |
https://leetcode.com/problems/number-of-islands/ |
Swap Nodes in Pairs |
Medium |
https://leetcode.com/problems/swap-nodes-in-pairs/ |
Add Two Numbers |
Medium |
https://leetcode.com/problems/add-two-numbers/ |
Clone Graph |
Medium |
https://leetcode.com/problems/clone-graph/ |
Coin Change |
Medium |
https://leetcode.com/problems/coin-change/ |
Container With Most Water |
Medium |
https://leetcode.com/problems/container-with-most-water/ |
Design Circular Deque |
Medium |
https://leetcode.com/problems/design-circular-deque/ |
Escape The Ghosts |
Medium |
https://leetcode.com/problems/escape-the-ghosts/ |
Find All Anagrams in a String |
Medium |
https://leetcode.com/problems/find-all-anagrams-in-a-string/ |
Generate Parenthesis |
Medium |
https://leetcode.com/problems/generate-parentheses |
Group Anagrams |
Medium |
https://leetcode.com/problems/group-anagrams/ |
Kth Largest Element in an Array |
Medium |
https://leetcode.com/problems/kth-largest-element-in-an-array/ |
Linked List Cycle II |
Medium |
https://leetcode.com/problems/linked-list-cycle-ii/ |
Longest Palindromic Substring |
Medium |
https://leetcode.com/problems/longest-palindromic-substring/ |
Longest Substring Without Reapeating Characters |
Medium |
https://leetcode.com/problems/longest-substring-without-repeating-characters |
Max Area Of Island |
Medium |
https://leetcode.com/problems/max-area-of-island/ |
Max Consecutive Ones III |
Medium |
https://leetcode.com/problems/max-consecutive-ones-iii |
Maximal Square |
Medium |
https://leetcode.com/problems/maximal-square/ |
Minimum Add to Make Parentheses Valid |
Medium |
https://leetcode.com/problems/minimum-add-to-make-parentheses-valid/ |
Minimum Size Subarray |
Medium |
https://leetcode.com/problems/minimum-size-subarray-sum |
Permutations |
Medium |
https://leetcode.com/problems/permutations/ |
Permutations II |
Medium |
https://leetcode.com/problems/permutations-ii/ |
Permutation in String |
Medium |
https://leetcode.com/problems/permutation-in-string/ |
Permutations Without Duplicates |
Medium |
https://leetcode.com/problems/permutations/ |
Restore IP Addresses |
Medium |
https://leetcode.com/problems/restore-ip-addresses/ |
SearchIng Rotated Sorted Array |
Medium |
https://leetcode.com/problems/search-in-rotated-sorted-array/ |
Search a 2D Matrix |
Medium |
https://leetcode.com/problems/search-a-2d-matrix/ |
Search a 2D Matrix II |
Medium |
https://leetcode.com/problems/search-a-2d-matrix/ |
Simplify Path |
Medium |
https://leetcode.com/problems/simplify-path/ |
Spiral Matrix |
Medium |
https://leetcode.com/problems/spiral-matrix/ |
Subsets |
Medium |
https://leetcode.com/problems/subsets/ |
Unique Binary Search Trees |
Medium |
https://leetcode.com/problems/unique-binary-search-trees/ |
Unique Paths |
Medium |
https://leetcode.com/problems/unique-paths/ |
Verify Preorder Serialization of a Binary Tree |
Medium |
https://leetcode.com/problems/verify-preorder-serialization-of-a-binary-tree/ |
Construct Binary Tree from Preorder and Inorder Traversal |
Medium |
https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ |
Lowest Common Ancestor of a Binary Tree |
Medium |
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ |
Maximum Sum of an Hourglass |
Medium |
https://leetcode.com/problems/maximum-sum-of-an-hourglass/ |
Next Permutation |
Medium |
https://leetcode.com/problems/next-permutation/ |
Time Needed to Rearrange a Binary String |
Medium |
https://leetcode.com/problems/time-needed-to-rearrange-a-binary-string/ |
Find Subarrays With Equal Sum |
Medium |
https://leetcode.com/problems/find-subarrays-with-equal-sum/ |
Reverse Integer |
Medium |
https://leetcode.com/problems/reverse-integer/ |
Minimize Maximum Pair Sum in Array |
Medium |
https://leetcode.com/problems/minimize-maximum-pair-sum-in-array/ |
Top K Frequent Elements |
Medium |
https://leetcode.com/problems/top-k-frequent-elements/ |
Gas Station |
Medium |
https://leetcode.com/problems/gas-station/description/ |
K Closest Points to Origin |
Medium |
https://leetcode.com/problems/k-closest-points-to-origin/ |
BestTimeToBuy |
Medium |
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii |
Best Time to Buy and Sell Stock |
Easy |
https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ |
Flood Fill |
Easy |
https://leetcode.com/problems/flood-fill/ |
Implement stack using queues |
Easy |
https://leetcode.com/problems/implement-stack-using-queues/ |
Number of Segments in a String |
Easy |
https://leetcode.com/problems/number-of-segments-in-a-string/ |
Maximun Subarray |
Easy |
https://leetcode.com/problems/maximum-subarray |
Min Stack |
Easy |
https://leetcode.com/problems/min-stack/ |
Reverse String II |
Easy |
https://leetcode.com/problems/reverse-string-ii/ |
Same Tree |
Easy |
https://leetcode.com/problems/same-tree/ |
Sum Of Square Numbers |
Easy |
https://leetcode.com/problems/sum-of-square-numbers/ |
Symmetric Tree |
Easy |
https://leetcode.com/problems/symmetric-tree/ |
Valid Parentheses |
Easy |
https://leetcode.com/problems/valid-parentheses/ |
Backspace String Compare |
Easy |
https://leetcode.com/problems/backspace-string-compare/ |
Binary Gap |
Easy |
https://leetcode.com/problems/binary-gap/ |
Majority Element |
Easy |
https://leetcode.com/problems/majority-element/ |
Lexographically Smallest String After A Swap |
Easy |
https://leetcode.com/problems/lexicographically-smallest-string-after-a-swap/ |
Longest Common Prefix |
Easy |
https://leetcode.com/problems/longest-common-prefix/ |
Two Sum |
Easy |
https://leetcode.com/problems/two-sum/ |
Tic Tac Toe |
Easy |
Permutations With Duplicates |
Easy |
Deletion Distance |
Easy |
Award Budget Cuts |
Easy |
Happy Number |
Easy |
https://leetcode.com/problems/happy-number/ |
Shuffle String |
Easy |
https://leetcode.com/problems/shuffle-string/ |
Reverse bit to make number equal |
Easy |
https://leetcode.com/problems/number-of-bit-changes-to-make-two-integers-equal/ |