[LeetCode] 529. Minesweeper
Let’s play the minesweeper game (Wikipedia, online game)! You are given an m x n char matrix board representing the game board where: ‘M’ represents an unrevealed mine,‘E’ represents an unrevealed emp
[LeetCode] 417. Pacific Atlantic Water Flow
There is an m x n rectangular island that borders both the Pacific Ocean and Atlantic Ocean. The Pacific Ocean touches the island’s left and top edges, and the Atlantic Ocean touches the island’s righ
[LeetCode] 329. Longest Increasing Path in a Matrix
Given an m x n integers matrix, return the length of the longest increasing path in matrix. From each cell, you can either move in four directions: left, right, up, or down. You may not move diagonall
[LeetCode] 1100. Find K-Length Substrings With No Repeated Characters
Given a string s and an integer k, return the number of substrings in s of length k with no repeated characters. Example 1:Input: s = “havefunonleetcode”, k = 5Output: 6Explanation: There ar
[LeetCode] 1512. Number of Good Pairs
Given an array of integers nums, return the number of good pairs. A pair (i, j) is called good if nums[i] == nums[j] and i < j. Example 1:Input: nums = [1,2,3,1,1,3]Output: 4Explanat
[LeetCode] 763. Partition Labels
You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part. Note that the partition is done so that after concatenating al
[LeetCode] 1503. Last Moment Before All Ants Fall Out of a Plank
We have a wooden plank of the length n units. Some ants are walking on the plank, each ant moves with speed 1 unit per second. Some of the ants move to the left, the other move to the right. When two
[LeetCode] 271. Encode and Decode Strings
Design an algorithm to encode a list of strings to a string. The encoded string is then sent over the network and is decoded back to the original list of strings. Machine 1 (sender) has the function: