Given the root of a binary tree, return the number of nodes where the value of the node is equal to the average of the values in its subtree. Note:The average of n elements is the sum of the n element

Given an integer array arr of distinct integers and an integer k. A game will be played between the first two elements of the array (i.e. arr[0] and arr[1]). In each round of the game, we compare arr[

You are given a 0-indexed integer array nums of even length consisting of an equal number of positive and negative integers. You should rearrange the elements of nums such that the modified array foll

You are given an integer array gifts denoting the number of gifts in various piles. Every second, you do the following: Choose the pile with the maximum number of gifts.If there is more than one pile

You are given a 0-indexed integer array nums and an integer k. You have a starting score of 0. In one operation:choose an index i such that 0 <= i < nums.length,increase your score by nums[

You are playing a video game where you are defending your city from a group of n monsters. You are given a 0-indexed integer array dist of size n, where dist[i] is the initial distance in kilometers o

You are given two strings start and target, both of length n. Each string consists only of the characters ‘L’, ‘R’, and ‘_’ where: The characters ‘L’ and ‘R’ represent pieces, where a piece ‘L’ can mo

You are given a floating-point number hour, representing the amount of time you have to reach the office. To commute to the office, you must take n trains in sequential order. You are also given an in

You are given two strings s and t consisting of only lowercase English letters. Return the minimum number of characters that need to be appended to the end of s so that t becomes a subsequence of s. A

You are given an integer array nums and an integer k. Find the maximum subarray sum of all the subarrays of nums that meet the following conditions:The length of the subarray is k, andAll the elements