int main()
{
	int a[100][100],b[100]={0};
	int i,j,n,sum=0,line=0;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n;j++)
		{
			scanf("%d",&a[i][j]);
			if(a[i][j]==0)
			b[i]++;
		}
        if(b[i]>0)
			line++;
		if(b[i]>sum)
			sum=b[i];
	}
	int num=sum*line-2*line-2*sum+4;
	printf("%d",num);
	return 0;
}