# LeetCode 26. Remove Duplicates from Sorted Array

Description https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not…

# LeetCode 139. Word Break

Description https://leetcode.com/problems/word-break/description/ Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or…

# LeetCode 102. Binary Tree Level Order Traversal

Description https://leetcode.com/problems/binary-tree-level-order-traversal/description/ Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by…

# LeetCode 110. Balanced Binary Tree

Description https://leetcode.com/problems/balanced-binary-tree/description/ Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined…

# LeetCode 101. Symmetric Tree

Description https://leetcode.com/problems/symmetric-tree/description/ Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For…

# LeetCode 100. Same Tree

Description https://leetcode.com/problems/same-tree/description/ Given two binary trees, write a function to check if they are the same or not. Two binary…

# LeetCode 16. 3Sum Closest

Description https://leetcode.com/problems/3sum-closest/description/ Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return…

# LeetCode 15. 3Sum

Description https://leetcode.com/problems/3sum/description/ Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the…

# LeetCode 63. Unique Paths II

Description https://leetcode.com/problems/unique-paths-ii/description/ Follow up for “Unique Paths”: Now consider if some obstacles are added to the grids. How many unique…

# LeetCode 62. Unique Paths

Description https://leetcode.com/problems/unique-paths/description/ A robot is located at the top-left corner of a m x n grid (marked ‘Start’ in the diagram below). The robot…