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

vector <int> a[1000500];
int n, m;

int main(){
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        a[i].resize(m + 2);
    if (n == m){
        for (int i = 1; i <= n; i++)
            a[i][i] = 1;
        cout << n << endl;
    } else if (n < m){
        for (int i = 1; i <= n; i++)
            a[i][i] = 1;
        for (int i = n + 1; i <= m; i++)
            a[n][i] = 1;
        cout << m << endl;
    } else if (n > m){
        for (int i = 1; i <= m; i++)
            a[i][i] = 1;
        for (int i = m + 1; i <= n; i++)
            a[i][m] = 1;
        cout << n << endl;
    }
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            cout << a[i][j] << (j == m ? '\n' : ' ');
    return 0;
}