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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, m;
    cin >> n >> m;
    cout << min(n, m) + (abs(n - m) + 1) / 2 << "\n";
    for(int i = 1; i <= n; i ++)
        for(int j = 1; j <= m; j ++)
            cout << "01"[(min(i, j) == min(n, m) && ((max(i, j) ^ min(i, j) ^ 1) & 1)) || i == j || (i == n && j == m)] << " \n"[j == m];
}