#include<stdio.h>
#include<math.h>
#define N 501
int n,m,a[N][N],k,viz,p;
inline int minim(int a,int b)
{
	return a<b?a:b;
}
void f(int x1,int y1,int x2,int y2,int &nr)
{
	if(x1<=m&&y1<=n&&x2<=m&&y2<=n&&x1<=x2&&y1<=y2)
	{
		int i,j,min;
		nr++;
		min=minim(x2-x1+1,y2-y1+1);
		for(k=0;pow(2,k+1)<=min;k++)
			;
		for(i=x1;i<=x1+k;i++)
			for(j=y1;j<=y1+k;j++)
					a[i][j]=nr;
		f(x1,y1+(int)pow(2,k),x1+(int)pow(2,k)-1,y2,nr);
		f(x1+(int)pow(2,k),y1,x2,y2,nr);
	}
}
void afis()
{
	int i,j;
	for(i=1;i<=m;i++)
	{
		for(j=1;j<=n;j++)
			printf("%d ",a[i][j]);
		printf("\n");
	}
}
int main()
{
	freopen("piese.in","r",stdin);
	freopen("piese.out","w",stdout);
	scanf("%d%d",&m,&n);
	p=0;
	f(1,1,m,n,p);
	printf("%d\n",p);
	afis();
	return 0;
}