//Given a non-negative integer x, compute and return the square root of x. // // Since the return type is an integer, t

//You are given a large integer represented as an integer array digits, where ea //ch digits[i] is the ith digit of the

//There is a robot on an m x n grid. The robot is initially located at the top-l //eft corner (i.e., grid[0][0]). The ro

//Given an array of intervals where intervals[i] = [starti, endi], merge all ove //rlapping intervals, and return an arr

//You are given an integer array nums. You are initially positioned at the array //'s first index, and each element in t

//Given an m x n matrix, return all elements of the matrix in spiral order. // // // Example 1: // // //Input: matrix =

//Given an integer array nums, find the contiguous subarray (containing at least // one number) which has the largest su

//Implement pow(x, n), which calculates x raised to the power n (i.e., xn). // // // Example 1: // // //Input: x = 2

//Given an array of strings strs, group the anagrams together. You can return th //e answer in any order. // // An Anag

//You are given an n x n 2D matrix representing an image, rotate the image by 90 // degrees (clockwise). // // You have

//Given an array nums of distinct integers, return all the possible permutations //. You can return the answer in any or

//Given an input string (s) and a pattern (p), implement wildcard pattern matchi //ng with support for '?' and '*' where