Given a string s, return the longest palindromic substring in s. A palindrome is a string which reads the same in both directions. For example, S = “aba” is a palindrome, S = “abc” is not.
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Leetcode SolutionGiven the heads of two singly linked-lists headA and headB, return the node at which the two lists intersect. If the two linked lists have no intersection at all, return null.
Intersection of Two Linked Lists LeetCode Solution Read More »
Leetcode SolutionGiven a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’, determine if the input string is valid.
Valid Parentheses LeetCode Solution Read More »
Leetcode SolutionGiven the head of a singly linked list, reverse the list, and return the reversed list.
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Leetcode SolutionGiven the array nums after the possible rotation and an integer target, return the index of target if it is in nums, or -1 if it is not in nums.
Search in Rotated Sorted Array LeetCode Solution Read More »
Leetcode SolutionGiven a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list’s nodes.
Swap Nodes in Pairs LeetCode Solution Read More »
Leetcode SolutionGiven n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining.
Trapping Rain Water LeetCode Solution Read More »
Leetcode SolutionGiven an array of strings strs, group the anagrams together. You can return the answer in any order.
Group Anagrams LeetCode Solution Read More »
Leetcode SolutionImplement pow(x, n), which calculates x raised to the power n.
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Leetcode SolutionDesign a stack that supports push, pop, top, and retrieving the minimum element in constant time.
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