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

int main() {
    int n, m; cin >> n >> m;
    int ans = 0;
    vector<vector<int>> a(n, vector<int>(m));
    for(int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (i == j) a[i][j] = 1, ans++;
        }
    }

    if(n != m) {
        if(n > m) {
            for(int i = 0, j = 0; i + 3 < n; i++, j++) {
                a[i + 3][j] = 1;
                ans++;
            }
        } else {
            for(int i = 0, j = 0; i < n; i++, j++) {
                a[i][j + 3] = 1;
                ans++;
            }
        }
    }
    if((n == 2 and m == 1) or (n == 1 and m == 2)) {
        cout << 2 << '\n';
        for(int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                cout << 1 << " ";
            }
            cout << '\n';
        }
        return 0;
    }
    cout << ans << '\n';
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cout << a[i][j] << " ";
        }
        cout << '\n';
    }
    return 0;
}