CSP-201709-1-打酱油

完整代码

#include<iostream> 
using namespace std;
int main() {
    int N, num = 0;
    cin >> N;

    int n1 = N / 50;
    if (n1 != 0)
    {
        N = N - n1 * 50;
        num += n1 * 7;
    }

    int n2 = N / 30;
    if (n2 != 0)
    {
        N = N - n2 * 30;
        num += n2 * 4;
    }

    int n3 = N / 10;
    num += n3;

    cout << num;
    return 0;
}