#include <bits/stdc++.h>
using namespace std;
ifstream f("piese.in");
ofstream g("piese.out");
int n,m,a[502][502];
int numar=0;
void umple(int x1,int y1, int x2, int y2){
    if(x1<=n&&x2<=n&&y1<=m&&y2<=m&&x1<=x2&&y1<=y2){int k=0;
    numar++;
    while((1<<k)<=min(x2-x1+1,y2-y1+1))
        k++;
    k--;
    for(int i=x1;i<=x1+(1<<k)-1;i++){
        for(int j=y1;j<=y1+(1<<k)-1;j++)a[i][j]=numar;
    }
    umple(x1,y1+(1<<k),x1+(1<<k)-1,y2);
    umple(x1+(1<<k),y1,x2,y2);}
}
int main()
{
    f>>n>>m;
    umple(1,1,n,m);
    g<<numar<<"\n";
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++)g<<a[i][j]<<" ";
        g<<"\n";
    }
    return 0;
}