백준 온라인 저지 (Baekjoon Online Judge) - 5032번 : 탄산 음료

https://www.acmicpc.net/problem/5032

5032번: 탄산 음료

 

#include<stdio.h>
 
int main() {
    int e, f, c;
    int drink = 0;
    int change = 0;
    int unchange = 0;
 
    scanf("%d %d %d",&e,&f,&c);
 
    e += f;
    while (e>=c) {
        change = e / c; unchange = e % c;
        drink += change;
        e = change + unchange;
    }
    printf("%d\n",drink);
    return 0;
}