题解 | #牛牛的快递#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        float a = scanner.nextFloat(); // 重量
        char b = scanner.next().charAt(0);// 是否加急 'y' or 'n'
        if(b == 'y') {
            if(a > 1 && a % 1 != 0) {
                System.out.println(20 + (int)(a - 1) + 6);
                //25是超过的一千克但是小于一千克的部分在加5得来的
            } else if(a > 1 && a % 1 == 0) {
                System.out.println(20 + (int)(a - 1) + 5);
            } else if(a < 1) {
                System.out.println(25);
            }
        } else if(b == 'n') {
            if(a > 1 && a % 1 != 0) {
                System.out.println(20 + (int)(a - 1) + 1);
            } else if(a > 1 && a % 1 == 0) {
                System.out.println(20 + (int)(a - 1));
            } else if(a < 1) {
                System.out.println(20);
            }
        }
        
    }
}