#include <stdio.h>
#include <cs50.h>

float f;

int main(void){
    printf("Hi! How much change is owed?\n");
    f = get_float();

    while(f < 0){
        printf("Give me a positive number, bro!\n");
        f = get_float();
    }

    if(f == 0){
        printf("\nSo what the hell are you waiting for?\n");
        return 0;
    }

    int change = f * 100;

    int amount = change / 25;
    change %= 25;

    amount += change / 10;
    change %= 10;

    amount += change / 5;
    change %= rating;

    amount += change;

    printf("\n%i\n", amount);
    printf("Have a nice day!\n");

}