Implement pow(x, n), which calculates x raised to the power n (i.e., xn). Solution C# Python3

Implement pow(x, n), which calculates x raised to the power n (i.e., xn). Solution C# Python3

Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k. A subarray is a…

Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1. Solution…

Every valid email consists of a local name and a domain name, separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+'.…

Given two integer arrays nums1 and nums2, return an array of their intersection. Each element in the result must be unique and you may return the…

Given an array of strings strs, group the anagrams together. You can return the answer in any order. An Anagram is a word or phrase formed…

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may…

You are given two integer arrays nums1 and nums2 sorted in ascending order and an integer k. Define a pair (u, v) which consists of one element from the…

Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order. Solution C# Python3