#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod = 998244353;
signed main() {
	int n,m;
	cin>>n>>m;
	cout<<max(n,m)<<"\n";
	for(int i=1;i<=n;++i) {
		for(int j=1;j<=m;++j) {
			if(i==j) {
				cout<<"1 ";
			}
			else if(j<=min(n,m)&&i<=min(n,m)) {
				cout<<"0 ";
			}
			else if(i==1||j==1) {
				cout<<"1 ";
			}
			else cout<<"0 ";
		}
		cout<<"\n";
	}
}