#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) x.begin(), x.end()

int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n, m;
    cin >> n >> m;
    cout << (n + m + 1) / 2 << '\n';
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            if (i == 0 && j % 2 == (m - 1) % 2) cout << "1 ";
            else if (j == 0 && i % 2 == (n - 1) % 2) cout << "1 ";
            else cout << "0 ";
        }
        cout << '\n';
    }
}