We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I’ll...

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example:Given a = 1 and b = 2, return 3. 在不考虑进位的情况下 a ^ b，只考虑...

Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library function such ...

Given two arrays, write a function to compute their intersection. Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note:Each element in the...

Given two arrays, write a function to compute their intersection. Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2]. Note:Each element in the re...

Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Given s = “hello”, return “holle”. Example 2:Given s = “leet...

Write a function that takes a string as input and returns the string reversed. Example:Given s = “hello”, return “olleh”. 123456789101112131415161718class So...

Given an integer, write a function to determine if it is a power of three. Follow up:Could you do it without using any loop / recursion? 这个题的follow up是希望能不用循...

You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. S...

Given an array nums, write a function to move all 0’s to the end of it while maintaining the relative order of the non-zero elements. For example, given nums...