#include<fstream>
using namespace std;
ifstream fin("piese.in");
ofstream fout("piese.out");
int n,m,a[501][501],i,j,ii,jj,l,sol;
int main(){
    fin>>n>>m;
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            if(a[i][j]==0){
                l=1;
                while(i+l<=n && j+l-1<=m){
                    l*=2;
                }
                l/=2;
                sol++;
                for(ii=i;ii<=i+l-1;ii++){
                    for(jj=1;jj<=j+l-1;jj++){
                        a[ii][jj]=sol;
                    }
                }
            }
        }
    }
    fout<<sol<<"\n";
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            fout<<a[i][j]<<" ";
        }
        fout<<"\n";
    }
}