知识点:

分支控制:分支控制

向上取整:ceil()

#include <cmath>
#include <iostream>
using namespace std;

int main() {
    float a = 0.0;
    char b = 'n';
    float fee = 0.0;

    cin >> a >> b;

    // fee = 20 + int((a - 1) + 0.9);
    fee = 20 + ceil(a - 1);

    if (b == 'y') {
        fee += 5;
    }

    cout << fee;

    return 0;
}