题解 | 牛牛的快递

#include<iostream>
#include<cmath>
using namespace std;
int main(){
    double n;
    char c;
    cin >> n >> c;
    if(n<=1.0){
        if(c=='y'){
            cout << "25" << endl;
        }
        else{
            cout << "20" << endl;
        }
    }
    else{
        if(c=='y'){
            cout << ceil(n)-1+25;
        }
        else{
            cout << ceil(n)-1+20;
        }
    }
    return 0;
}