#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ep emplace_back
#define fi first
#define se second
using ll=long long;
using ull=unsigned long long;
#define pi pair<int, int>
#ifdef LOCAL
#include"D:/Administrator/Documents/vscode/algo/debug.h"
#else
#define debug(...) 42
#endif

mt19937 mrand(random_device{}());
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signed main(){
#ifndef LOCAL
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#endif
#ifdef LOCAL
    freopen("D:/Administrator/Documents/vscode/in.txt","r",stdin);
    freopen("D:/Administrator/Documents/vscode/out.txt","w",stdout);
#endif
    int n,m;
    cin>>n>>m;
    int l=min(n,m);
    int r=max(n,m);
    cout<<(l+(r-l+1)/2)<<'\n';
    if(n>=m)
    {
    for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=m;j++)
            {
                if(i==j)
                {
                    cout<<1<<' '; 
                }else if(i>m&&(n-m)%2==0)
                {
                    if((i-m)%2==0&&j==1)
                    {
                        cout<<1<<' ';
                    }else cout<<0<<' ';
                }else if(i>m&&(n-m)%2!=0)
                {
                    if((i-m)%2!=0&&j==1)
                    {
                        cout<<1<<' ';
                    }else cout<<0<<' ';
                }else cout<<0<<' ';
            }
            cout<<'\n';
    }
    }else{
        for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=m;j++)
            {
                if(i==j)
                {
                    cout<<1<<' '; 
                }else if(j>n&&(m-n)%2==0)
                {
                    if((j-n)%2==0&&i==1)
                    {
                        cout<<1<<' ';
                    }else cout<<0<<' ';
                }else if(j>n&&(m-n)%2!=0)
                {
                    if((j-n)%2!=0&&i==1)
                    {
                        cout<<1<<' ';
                    }else cout<<0<<' ';
                }else cout<<0<<' ';
            }
            cout<<'\n';
    }
    }
    return 0;
}