Add Leetcode Number Of islands Solution

[nizar787]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like

Describe alternatives you've considered

Additional context

[bhalerao-2002]

Hello @nizar787 , I can add that solution, Assign me this issue under hacktoberfest

[sajithsojan]

please review my code

[alipsa2000]

This is the code can you please review this code
#include
#include
using namespace std;
class Solution {
public:
int numIslands(vector<vector>& grid) {
if (grid.empty() || grid[0].empty()) {
return 0;
}
int numIslands = 0;
int m = grid.size();
int n = grid[0].size();
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++) {
if (grid[i][j] == '1') {
numIslands++;
dfs(grid, i, j);
}
}
}
return numIslands;
}
private:
void dfs(vector<vector>& grid, int i, int j) {
if (i < 0 || i >= grid.size() || j < 0 || j >= grid[0].size() || grid[i][j] != '1') {
return;
}
grid[i][j] = '0';
dfs(grid, i - 1, j);
dfs(grid, i + 1, j);
dfs(grid, i, j - 1);
dfs(grid, i, j + 1);
}
};

[PRITISH212121]

i have solved this problem before,i m attaching my leetcode profile,please assign it to me
https://leetcode.com/pritishyo10/

[navya975]

I have solved this problem before,I am attaching my leetcode profile,please assign it to me
https://leetcode.com/navya975/

[mrinalproxy]

assigned this problem to me