361A-levko-and-table.cpp

#include<iostream>
using namespace std;
int main()
{
    int n, k, i, j;
    cin >> n >> k;
    for(i=0; i<n; i++) 
    {
        for(j=0; j<n; j++) 
        {
            if(i==j) 
            {
                cout << k << " ";
            }
            else 
            {
                cout << 0 << " ";
            }
        }
        cout << "\n";
    }
    return 0;
}