题解 | 牛牛的快递

#include <iostream>
using namespace std;

int main() {
    float num;
    char chose;
    cin >> num >> chose;
    int sum = 20;
    if (num > 1) {
        // 处理重量进位逻辑
        if (num - (int)num == 0) {
            sum += (int)(num - 1);
        } else {
            sum += (int)(num - 1) + 1;
        }
    }
    if (chose == 'y') {
        sum += 5;
    }
    cout << sum;
    return 0;
}