It is much more interesting to look for good tests for this task than just to solve it.
Here is the AC program (with a small error in order not to publish solutions). I will look for where it will fail.
#include<iostream>
#include<cmath>//too lazy to write sqrt() yourself
int main() {
    unsigned l, h, o;
    std::cin>>l>>h>>o;
    unsigned phase = 0;
    if(l<h*2) phase = o*sqrt((2*h-l)/981)/15+1;
    char const*answer[]{"Butter","Bread\n"};
    std::cout<<answer[(phase>>1)&1]<<std::endl;
}