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LeetCode

LeetCode Problems with Solutions

# Problem Solution Difficulty
1 Two Sum PHP, JS Easy
3 Longest Substring Without Repeating Characters PHP Medium
5 Longest Palindromic Substring PHP Medium
7 Reverse Integer PHP Medium
15 3Sum PHP Medium
20 Valid Parentheses PHP, JS Easy
23 Merge K Sorted Lists PHP Hard
24 Swap Nodes in Pairs PHP Medium
28 Find the Index of the First Occurence in a String PHP Medium
33 Search in Rotated Sorted Array PHP Medium
35 Search Insert Position PHP Easy
49 Group Anagrams PHP Medium
53 Maximum Subarray PHP Medium
55 Jump Game PHP Medium
58 Length of Last Word PHP, JS Easy
61 Rotate List PHP Medium
83 Remove Duplicates from Sorted List PHP, JS Easy
88 Merge Sorted Array PHP Easy
94 Binary Tree Inorder Traversal PHP Easy
104 Maximum Depth of Binary Tree PHP Easy
105 Construct Binary Tree from Preorder and Inorder Traversal PHP Medium
111 Minimum Depth of Binary Tree PHP Easy
121 Best Time To Buy and Sell Stock PHP, JS Easy
134 Gas Station PHP Medium
142 Linked List Cycle II PHP Medium
144 Binary Tree Preorder Traversal PHP Easy
145 Binary Tree Postorder Traversal PHP Easy
155 Min Stack PHP Medium
167 Two Sum II - Input Array is Sorted PHP Medium
189 Rotate Array PHP Medium
198 House Robber PHP Medium
200 Number of Islands PHP Medium
203 Remove Linked List Elements PHP Easy
207 Course Schedule PHP Medium
213 House Robber II PHP Medium
230 Kth Smallest Element In a BST PHP Medium
238 Product of Array Except Self PHP Medium
303 Range Sum Query - Immutable PHP Easy
347 Top K Frequent Elements PHP Medium
417 Pacific Atlantic Water Flow PHP Medium
438 Find All Anagrams in a String PHP Medium
540 Single Element In a Sorted Array PHP Medium
547 Number of Provinces PHP Medium
560 Subarray Sum Equals K PHP Medium
622 Design Circular Queue PHP Medium
647 Palindromic Substrings PHP Medium
678 Valid Parenthesis String PHP Medium
704 Binary Search PHP Easy
707 Design Linked List PHP Medium
746 Min Cost Climbing Stairs PHP Easy
846 Hand of Straights PHP Medium
875 Koko Eating Bananas PHP Medium
904 Fruit Into Baskets PHP Medium
977 Squares of a Sorted Array PHP Easy
1137 N-th Tribonacci Number PHP Easy
1202 Smallest String With Swaps PHP Medium
1876 Substrings of Size Three with Distinct Characters PHP Easy
1909 Remove One Element to Make the Array Strictly Increasing PHP Easy
1971 Find If Path Exists in Graph PHP Easy
2500 Delete Greatest Element in Each Row PHP Easy