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You are given a 2D matrix grid of size 3 x 3 consisting only of characters 'B' and 'W'. Character 'W' represents the white color, and character 'B' represents the black color.

3123. Find Edges in Shortest Paths

Posted on 2024-05-16 Edited on 2025-06-14 In Leetcode

3123. Find Edges in Shortest Paths

Description

You are given an undirected weighted graph of n nodes numbered from 0 to n - 1. The graph consists of m edges represented by a 2D array edges, where edges[i] = [a_i, b_i, w_i] indicates that there is an edge between nodes a_i and b_i with weight w_i.

3122. Minimum Number of Operations to Satisfy Conditions

Posted on 2024-05-16 Edited on 2025-06-14 In Leetcode

3122. Minimum Number of Operations to Satisfy Conditions

Description

You are given a 2D matrix grid of size m x n. In one operation , you can change the value of any cell to any non-negative number. You need to perform some operations such that each cell grid[i][j] is:

3121. Count the Number of Special Characters II

Posted on 2024-05-16 Edited on 2025-06-14 In Leetcode

3121. Count the Number of Special Characters II

Description

You are given a string word. A letterc is called special if it appears both in lowercase and uppercase in word, and every lowercase occurrence of c appears before the first uppercase occurrence of c.