#include <cstdio>
using namespace std;
int n,m,i,j,nr,p;
int a[501][501];
bool blank(int x,int y,int leng)
{
    int i,j;
    for(i=x;i<=x+leng-1;i++)
        for(j=y;j<=y+leng-1;j++)
            if(a[i][j]!=0)
                return false;
    return true;
}
void umplere(int x,int y,int leng)
{
    int i,j;
    nr++;
    for(i=x;i<=x+leng-1;i++)
        for(j=y;j<=y+leng-1;j++)
            a[i][j]=nr;
}
void execut(int intindere)
{
    int j,i;
    for(i=1;i<=n-intindere+1;i++)
        for(j=1;j<=m-intindere+1;j++)
        {
            if(blank(i,j,intindere)==true)
                umplere(i,j,intindere);
        }
}
int main()
{
    freopen("piese.in","r",stdin);
    freopen("piese.out","w",stdout);
    scanf("%d%d",&n,&m);
    p=1;
    while(p<=n&&p<=m)
        p*=2;
    p/=2;
    while(p!=1)
    {
        execut(p);
        p/=2;
    }
    execut(1);
    printf("%d\n",nr);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=m;j++)
            printf("%d ",a[i][j]);
        printf("\n");
    }
    return 0;
}