#include <fstream>
#include <cmath>

using namespace std;

const int nmax=505;

int v[nmax][nmax];
int k=0;

void solve(int xi,int yi,int xf,int yf)
{
    int p2=(1<<(int)log2(min(xf-xi+1,yf-yi+1)));
    k++;
    for(int i=xi; i<=xi+p2-1; i++)
        for(int j=yi; j<=yi+p2-1; j++)
            v[i][j]=k;
    if(yi+p2<=yf and xi+p2-1<=xf)
        solve(xi,yi+p2,xi+p2-1,yf);
    if(xi+p2<=xf)
        solve(xi+p2,yi,xf,yf);
}

int main()
{
    ifstream cin("piese.in");
    ofstream cout("piese.out");
    int n,m;
    cin>>n>>m;
    solve(1,1,n,m);
    cout<<k<<"\n";
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
            cout<<v[i][j]<<" ";
        cout<<"\n";
    }
    return 0;
}