use strict;
use warnings;

my ($xp, $yp) = split / /, <>;
my $ans;
my $r = sqrt($xp*$xp + $yp*$yp);
if($r == int $r) {	
	$ans = 2*(int $r) + 1;
} else {
	$ans = 2*((int $r) + 1);
}

for(my $i = $ans / 2; $i > $r; $i -= 0.5) {
	$ans = $i * 2;
}
print "$ans\n";
exit;