#include<fstream>
#include<vector>
#define dmax 510
using namespace std;

int n,m;
int put[15],nr;
int a[dmax][dmax];


void citire()
{
 ifstream fin("piese.in");
 
 fin>>n>>m;
 
 fin.close();
}


int acoperire(int h, int w, int x, int y)
{
 int i=0,j,k,t1=0,t2=0;
 
 while (put[i] <= h && put[i] <= w)
	 i++;
 i--;
 
 nr++;
 for (j=x; j<x + put[i]; j++)
	 for (k=y; k<y + put[i]; k++)
		 a[j][k] = nr;
 
 if (put[i] < h)
	 t1 = acoperire(h-put[i], put[i], x+put[i], y);
 
 if (put[i] < w)
	 t2 = acoperire(h, w-put[i], x, y+put[i]);
 
 return t1+t2+1;
}


void afisare()
{
 int i,j;
	
 ofstream fout("piese.out");
 
 fout<<acoperire(n,m,1,1)<<'\n';
 
 for (i=1; i<=n; i++)
	 {
	  for (j=1; j<=m; j++)
		  fout<<a[i][j]<<" ";
	  fout<<'\n';
	 }
 
 fout.close();
}


int main()
{
 int i;
	
 citire();
 
 put[0] = 1;
 for (i=1; i<=10; i++)
	 put[i] = put[i-1] * 2;
 
 afisare();
	
 return 0;
}