LeetCode 189. Rotate Array
Description https://leetcode.com/problems/rotate-array/ Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k…
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LeetCode 217. Contains Duplicate
Description https://leetcode.com/problems/contains-duplicate/ Given an array of integers, find if the array contains any duplicates. Your function should return true if…
LeetCode 66. Plus One
Description https://leetcode.com/problems/plus-one/ You are given a large integer represented as an integer array digits, where each digits[i] is the ith digit of the integer. The digits are…
LeetCode 344. Reverse String
Description https://leetcode.com/problems/reverse-string/ Write a function that reverses a string. The input string is given as an array of characters char[]. Do…
LeetCode 53. Maximum Subarray
Description https://leetcode.com/problems/maximum-subarray/ Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum…
LeetCode 102. Binary Tree Level Order Traversal
Description https://leetcode.com/problems/binary-tree-level-order-traversal/ Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by…
LeetCode 104. Maximum Depth of Binary Tree
Description Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest…
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 34. Find First and Last Position of Element in Sorted Array
Description Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your algorithm’s…
LeetCode 1. Two Sum
Description https://leetcode.com/problems/two-sum/ Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.…