#include <bits/stdc++.h>
    
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
    
mt19937 rng((int) chrono::steady_clock::now().time_since_epoch().count());
    
const int MOD = 1e9 + 7;
const int MAXN = 2e5 + 5;
const int INF = 2e9;

int main () {
    ios::sync_with_stdio(false);
    cin.tie(0);
	int n, m;
    cin >> n >> m;
    vector<vector<int>> v(n, vector<int> (m, 0));
    int cnt = 0;
    for (int j = m - 1; j >= 0; j -= 2) {
        v[0][j] = 1;
        cnt++;
    }
    for (int i = n - 1; i >= 0; i -= 2) {
        cnt += 1 - v[i][0];
        v[i][0] = 1;
    }
    cout << cnt << '\n';
    for (auto x : v) {
        for (int y : x) cout << y << ' ';
        cout << '\n';
    }
    return 0;
}