#include<bits/stdc++.h>
using namespace std;
#define _for(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
#define debug(a) cout<<#a<<a<<endl;
#define int long long
#define io_speed_up ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
typedef long long ll;
typedef unsigned long long u64;
typedef pair<int,int> pii;
typedef vector<int> vi;
void solve(){
    int n,m;
    cin>>n>>m;
    int ans=(n+m+1)/2;
    cout<<ans<<endl;
    for(int i=1;i<=n-1;i++){
        for(int j=1;j<=m;j++){
            if(j==1&&i%2==1) cout<<1<<" ";
            else cout<<0<<" "; 
        }
        cout<<endl;
    }
    int a[m+10];
    for(int i=m;i>=1;i--){
        if((i%2)==(m%2)) a[i]=1;
        else a[i]=0;
    }
    if(m%2==0&&n%2==1) a[1]=1;
    for(int i=1;i<=m;i++){
        cout<<a[i]<<" ";
    }
    
}
signed main(){
    io_speed_up;
    solve();
    return 0;
}