1719. Number Of Ways To Reconstruct A Tree Problem You are given an array pairs, where pairs[i] = [xᵢ, yᵢ], and: There are no duplicates. xᵢ < yᵢ Let ways be the n... 2024-12-10 hard difficult todo
2982. Find Longest Special Substring That Occurs Thrice II 跟 2981. Find Longest Special Substring That Occurs Thrice I 一模一样，只不过 s 的长度上限从 50 增加到 5 * 10⁵。 https://leetcode.com/problems/f... 2024-12-10 medium
2981. Find Longest Special Substring That Occurs Thrice I Problem You are given a string s that consists of lowercase English letters. A string is called special if it is made up of o... 2024-12-10 medium
935. Knight Dialer Problem The chess knight has a unique movement, it may move two squares vertically and one square horizontally, or two s... 2024-12-10 medium
1982. Find Array Given Subset Sums Problem You are given an integer n representing the length of an unknown array that you are trying to recover. You are also g... 2024-12-09 hard difficult
954. Array of Doubled Pairs Problem Given an integer array of even length arr, return true if it is possible to reorder arr such that arr[2 * i + 1] = 2 ... 2024-12-09 medium
2. Add Two Numbers Problem You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse ord... 2024-12-09 medium
3152. Special Array II Problem An array is considered special if every pair of its adjacent elements contains two numbers with different parity. You... 2024-12-09 medium
3151. Special Array I Problem An array is considered special if every pair of its adjacent elements contains two numbers with different parity. You... 2024-12-09 easy
1812. Determine Color of a Chessboard Square Problem You are given coordinates, a string that represents the coordinates of a square of the chessboard. Below is a chessbo... 2024-12-09 easy
2054. Two Best Non-Overlapping Events Problem You are given a 0-indexed 2D integer array of events where events[i] = [startTimeᵢ, endTimeᵢ, valueᵢ]. The iᵗʰ event ... 2024-12-08 medium todo
782. Transform to Chessboard Problem You are given an n x n binary grid board. In each move, you can swap any two rows with each other, or any two columns... 2024-12-08 hard
1760. Minimum Limit of Balls in a Bag Problem You are given an integer array nums where the iᵗʰ bag contains nums[i] balls. You are also given an integer maxOperat... 2024-12-07 medium
688. Knight Probability in Chessboard Problem On an n x n chessboard, a knight starts at the cell (row, column) and attempts to make exactly k moves. The rows and ... 2024-12-07 medium
2554. Maximum Number of Integers to Choose From a Range I Problem You are given an integer array banned and two integers n and maxSum. You are choosing some number of integers followi... 2024-12-06 medium
999. Available Captures for Rook Problem You are given an 8 x 8 matrix representing a chessboard. There is exactly one white rook represented by 'R', some num... 2024-12-06 easy
2337. Move Pieces to Obtain a String Problem You are given two strings start and target, both of length n. Each string consists only of the characters 'L', 'R', a... 2024-12-05 medium
3001. Minimum Moves to Capture The Queen Problem There is a 1-indexed 8 x 8 chessboard containing 3 pieces. You are given 6 integers a, b, c, d, e, and f where: (a, ... 2024-12-05 medium
2056. Number of Valid Move Combinations On Chessboard Problem There is an 8 x 8 chessboard containing n pieces (rooks, queens, or bishops). You are given a string array pieces of ... 2024-12-04 hard
2825. Make String a Subsequence Using Cyclic Increments Problem You are given two 0-indexed strings str1 and str2. In an operation, you select a set of indices in str1, and for each... 2024-12-04 medium
2109. Adding Spaces to a String Problem You are given a 0-indexed string s and a 0-indexed integer array spaces that describes the indices in the original st... 2024-12-03 medium
3274. Check if Two Chessboard Squares Have the Same Color Problem You are given two strings, coordinate1 and coordinate2, representing the coordinates of a square on an 8 x 8 chessboa... 2024-12-03 easy
1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence Problem Given a sentence that consists of some words separated by a single space, and a searchWord, check if searchWord is a ... 2024-12-02 easy
52. N-Queens II Problem The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each oth... 2024-12-02 hard
1531. String Compression II Problem Run-length encoding is a string compression method that works by replacing consecutive identical characters (rep... 2024-12-01 hard difficult
1346. Check If N and Its Double Exist Problem Given an array arr of integers, check if there exist two indices i and j such that : i != j 0 <= i, j < arr.le... 2024-12-01 easy
51. N-Queens Problem The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each oth... 2024-12-02 hard
2097. Valid Arrangement of Pairs Problem You are given a 0-indexed 2D integer array pairs where pairs[i] = [startᵢ, endᵢ]. An arrangement of pairs is valid if... 2024-11-30 hard todo
3232. Find if Digit Game Can Be Won Problem You are given an array of positive integers nums. Alice and Bob are playing a game. In the game, Alice can choose eit... 2024-11-30 easy
2577. Minimum Time to Visit a Cell In a Grid Problem You are given a m x n matrix grid consisting of non-negative integers where grid[row][col] represents the minimum tim... 2024-11-29 hard
3251. Find the Count of Monotonic Pairs II 跟 3250. Find the Count of Monotonic Pairs I 一模一样，只不过 nums[i] 的上限从 50 增加到 1000。 https://leetcode.cn/problems/find-the-count-of... 2024-11-29 hard
3250. Find the Count of Monotonic Pairs I Problem You are given an array of positive integers nums of length n. We call a pair of non-negative integer arrays (arr1, ar... 2024-11-29 hard
