Where is the error in my code?
Please, help...

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

int main() {
    float l, h, w, n, t;

    scanf("%f%f%f", &l, &h, &w);

    h /= 100;
    l /= 100;
    w /= 60;

        h -= l/2;
        t = sqrt(2*h/9.81);
        n = t*w;
        n -= (int) n;
        if(n <= 0.25 || n >= 0.75) printf("butter");
        else printf("bread");


    return 0;
}