#include <bits/stdc++.h>
#include <iostream>

using namespace std;

int main()
{
    int x,y;
    cin>>x;
    cin>>y;
    
    cout<<max(x,y)<<endl;
    for(int i=0;i<x;i++)
    {
        for(int j=0;j<y;j++)
        {
            if(i==j || (j>=x&&i==0) || (i>=y)&&j==0)
                cout<<'1'<<" ";
            else
                cout<<'0'<<" ";
        }
        cout<<endl;
    }

    return 0;
}