#include <stdio.h>
#include <math.h>

int main(void)
{
	short xp,yp;
	double r;
	scanf("%hd %hd",&xp,&yp);

	r = sqrt(xp*xp + yp*yp);
	printf("%d\n",(int)((r+0.5)*2));
	
	return 0;
}