#include <fstream>
#include <cmath>

using namespace std;

int cnt=0,mat[505][505];

void fill(int x1,int y1,int x2,int y2)
{
    int mi=min(x2-x1,y2-y1);
    int put=(1<<(int)log2(mi+1));
    cnt++;
    for(int i=x1;i<=x1+put-1;i++)
    {
        for(int j=y1;j<=y1+put-1;j++)
        {
            mat[i][j]=cnt;
        }
    }
    if(y1+put<=y2&&x1+put-1<=x2)
        fill(x1,y1+put,x1+put-1,y2);
    if(x1+put<=x2)
        fill(x1+put,y1,x2,y2);
}
int main()
{
    ifstream cin("piese.in");
    ofstream cout("piese.out");
    int n,m,last=1;
    cin>>n>>m;
    fill(1,1,n,m);
    cout<<cnt<<"\n";
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            cout<<mat[i][j]<<" ";
        }
        cout<<"\n";
    }
    return 0;
}