Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replace...

Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: 12345Input: [1,1,0,1,1,1]Output: 3E...

268. Missing NumberGiven an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing fro...

219. Contains Duplicate II Given an array of integers and an integer k, find out whether there are two distinct indices i and...

189. Rotate Array Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,...

66. Plus OneGiven a non-negative integer represented as a non-empty array of digits, plus one to the integer. You may assume...

88. Merge Sorted Array Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note:You...

167. Two Sum II - Input array is sorted Given an array of integers that is already sorted in ascending order, find two numbe...

136 Single Number Given an array of integers, every element appears twice except for one. Find that single one. Note:Your alg...

107. Binary Tree Level Order Traversal II Given a binary tree, return the bottom-up level order traversal of its nodes’ value...