problems with online checker

[edhelatar]

do anybody know why my program is not working corectly i still have wrong answer. i am sure that the algorithm is ok because on all test he was giving good answer.
here's my code:
<code=c++>
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;

int main(int argc, char *argv[])
{
float l, h, omega;
double long wynik, obroty_wykonane;

cin>> l >> h >> omega;
obroty_wykonane=((omega/60)*sqrt(((h-(0.5*l))/450.5)));
wynik=obroty_wykonane-floor(obroty_wykonane);
if (wynik>0.25 && wynik<0.75) {cout << "bread"<< endl;}
else {cout << "butter"<< endl;}
return EXIT_SUCCESS;
}
</code>
and the problem is http://acm.timus.ru/problem.aspx?space=1&num=1800
thanks for help and sorry for my engish:)

[hamsterman]

What makes you say there is an error at all?

[edhelatar]

online checker (im not sure of the name of it in english) is saying me wrong answer:) i think its enough

[hamsterman]

It seems to me that you miscalculated t = sqrt( g*h/2 ) while it should be sqrt( g*h*2 )

^{by the way, why is Anka 4 meters tall?}