Problem Description Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order. leetcode Solution class Solution { List<List&...

Problem Description The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to t...

Problem Description You are given a 0-indexed array of non-negative integers nums. For each integer in nums, you must find its respective second greater integer. The second greater integer of nums...

Problem Description Given a positive integer n, find the smallest integer which has exactly the same digits existing in the integer n and is greater in value than n. If no such positive integer ex...

Problem Description Given a circular integer array nums (i.e., the next element of nums[nums.length - 1] is nums[0]), return the next greater number for every element in nums. The next greater num...

Problem Description The next greater element of some element x in an array is the first greater element that is to the right of x in the same array. You are given two distinct 0-indexed integer ar...

Problem Description Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following properties: Integers in each row are sorted i...

Problem Description Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following properties: Integers in each row are sorted f...

This question is part of NeetCode150 series. PROBLEM DESCRIPTION Given two strings s1 and s2, return true if s2 contains a permutation of s1, or false otherwise. In other words, return true if on...

This question is part of NeetCode150 series. Problem Description You are given a string s and an integer k. You can choose any character of the string and change it to any other uppercase English...