#include <stdio.h>
#include <cs50.h>
#include <math.h>
int main ()
{   float c;
    int s = 0, z = 0, d = 0, e = 0, x = 0, f = 0;
    do
    {
    c = get_float ("Change:" );
    }
    while(c < 0);
    c = c * 100;

    s = c / 25; // 1
    z = s % 25;

    d = z / 10 ; // 2
    e = z % 10;

    x = e / 5; // 3
    f = e % 5; //4
    printf("I have %i coins",s+d+x+f);




    return 0;
}