[LeetCode] 1861. Rotating the Box
You are given an m x n matrix of characters box representing a side-view of a box. Each cell of the box is one of the following:A stone ‘#’A stationary obstacle ‘*’Empty ‘.’ The box is rotated 90 degr
[LeetCode] 3238. Find the Number of Winning Players
You are given an integer n representing the number of players in a game and a 2D array pick where pick[i] = [xi, yi] represents that the player x picked a ball of color y. Player i wins the game
[LeetCode] 2257. Count Unguarded Cells in the Grid
You are given two integers m and n representing a 0-indexed m x n grid. You are also given two 2D integer arrays guards and walls where guards[i] = [rowi, coli] and walls[j] = [rowj, colj] r
[LeetCode] 2516. Take K of Each Character From Left and Right
You are given a string s consisting of the characters ‘a’, ‘b’, and ‘c’ and a non-negative integer k. Each minute, you may take either the leftmost character of s, or the rightmost character of s. Ret
[LeetCode] 1652. Defuse the Bomb
You have a bomb to defuse, and your time is running out! Your informer will provide you with a circular array code of length of n and a key k. To decrypt the code, you must replace every number. All t
[LeetCode] 661. Image Smoother
An image smoother is a filter of the size 3 x 3 that can be applied to each cell of an image by rounding down the average of the cell and the eight surrounding cells (i.e., the average of the nine cel
[LeetCode] 911. Online Election
You are given two integer arrays persons and times. In an election, the ith vote was cast for persons[i] at time times[i]. For each query at a time t, find the person that was leading the election at
[LeetCode] 1146. Snapshot Array
Implement a SnapshotArray that supports the following interface:SnapshotArray(int length) initializes an array-like data structure with the given length. Initially, each element equals 0.void set(inde