fill rec

#include "bits/stdc++.h"
using namespace std;

int a[100][100];

inline void Fill(int i, int j)
{
    a[i][j] = 1;
    if(a[i+1][j]== -1)
        Fill(i + 1, j);
    if(a[i-1][j]== -1)
        Fill(i - 1, j);
    if(a[i][j+1]== -1)
        Fill(i, j + 1);
    if(a[i][j-1]== -1)
        Fill(i, j - 1);

}

int main()
{
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            a[i][j] = -1;
    Fill(1, 1);

    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= m; j++)
            cout << a[i][j] << ' ';
        cout << endl;
    }
    return 0;
}