242. Valid Anagram题目Given two strings s and t , write a function to determine if t is an anagram of s.Example 1:Input: s = "anagram", t = "nagaram"Output: trueExample 2:Input: s = "rat", t ..

Missing NumberGiven an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array.Example 1:Input: [3,0,1]Output: 2Example 2:Input: [9,6,4,2,3,5...

Single NumberGiven a non-empty array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implemen...

88. Merge Sorted ArrayGiven two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.Note:The number of elements initialized in nums1 and nums2 are m and n respectiv...

Power of TwoGiven an integer, write a function to determine if it is a power of two.Example 1:Input: 1Output: true Explanation: 20 = 1Example 2:Input: 16Output: trueExplanation: 24 = 16Exam...

Maximum SubarraGiven an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Example: Input: [-2,1,-3,4,-1,2,1,-5,4], Ou...