// mines.cpp : Defines the entry point for the console application.
//


#include "stdio.h"



#define N 1024 
#define M 1024 

int minx,miny,maxx,maxy;
int res,n,m;

int main(int argc, char* argv[])
{
	int i,j,temp,flag,x,y;
	res=0;
	minx=0;
	miny=0;
	maxx=0;
	maxy=0;
	flag=0;

	freopen("mines.in","r",stdin);
	freopen("mines.out","w",stdout);

	scanf("%d %d",&n,&m);
		
	for(i=0;i<n;i++)
	{
		scanf("\n");
		for(j=0;j<m;j++)
		{
			if(j!=(n-1))
			{
				scanf("%d ",&temp); 
			}
			else
			{
				scanf("%d",&temp); 							
			}


			if(temp==1)
			{
				if(flag==0) 
				{
					minx=i;
					miny=j;
					maxx=i;
					maxy=j;
					flag=1;
				}
				else
				{
					if(i>maxx)
					{
						maxx=i;
					}
					if(i<minx)
					{
						minx=i;
					}
					if(j>maxy)
					{
						maxy=j;
					}
					if(j<miny)
					{
						miny=j;
					}
				}

			}
		}
	}

	x=maxx-minx+1;
	y=maxy-miny+1;
	/*
	if(x>y)
	{
		res=n*m-x*y+x+(x-y);
	}
	else
	{
		res=n*m-x*y+y+(y-x);
	}
*/
	res=n*m-x*y+((n*m)%(x*y));

	printf("%d",res);

	return 0;
}