#include <bits/stdc++.h>

using namespace std;

#define ll long long

int dx[] = {0,0,1,-1};
int dy[] = {1,-1,0,0};

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

	int n,m;cin >> n >> m;
	vector<vector<int>> vis(n + 5,vector<int>(m + 5));
	auto r = vis;
	int cnt = 0;
	for (int i = 1;i <= min(n,m);i++){
		r[i][i] = 1;
		cnt++;
	}
	if (n < m){
		for (int i = m;i > n;i -= 2){
			r[1][i] = 1;
			cnt++;
		}
	}else{
		for (int i = n;i > m;i -= 2){
			r[i][1] = 1;
			cnt++;
		}
	}
	cout << cnt << endl;
	for (int i = 1;i <= n;i++){
		for (int j = 1;j <= m;j++){
			cout << r[i][j] << " \n"[j == m];
		}
	}

	return 0;
}