## K-th Symbol in Grammar (C# and Python3)

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

## Pow(x, n) (C# and Python3)

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

## Subarray Sum Equals K (C# and 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…

## First Unique Character in a String (C# and Python3)

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

## Unique Email Addresses (C# and Python3)

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 '+'.…

## Intersection of Two Arrays (C# and Python3)

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…

## Group Anagrams (C# and Python3)

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…

## Two Sum (C# and Python3)

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…

## Find K Pairs with Smallest Sums (C# and Python3)

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…