Leetcode 200. Number of Islands | | Leetcode 200. Number of Islands 文章作者:Tyan博客:noahsnail.com | CSDN | 简书 1. Description 2. Solution1234567891011121314151617181920212223242526272829303132class Solution {public: int numIslands(vector<vector<char>>& grid) { if(grid.size() == 0) { return 0; } int islands = 0; int rows = grid.size(); int columns = grid[0].size(); for(int i = 0; i < rows; i++) { for(int j = 0; j < columns; j++) { if(grid[i][j] == '1') { islands++; removeIsland(grid, i, j, rows, columns); } } } return islands; }private: void removeIsland(vector<vector<char>>& grid, int i, int j, int& rows, int& columns) { if(i < 0 || i == rows || j < 0 || j == columns || grid[i][j] == '0') { return; } grid[i][j] = '0'; removeIsland(grid, i + 1, j, rows, columns); removeIsland(grid, i - 1, j, rows, columns); removeIsland(grid, i, j + 1, rows, columns); removeIsland(grid, i, j - 1, rows, columns); }}; Reference https://leetcode.com/problems/number-of-islands/description/ 如果有收获,可以请我喝杯咖啡! 赏 微信打赏 支付宝打赏