题解 | #牛牛的快递#

简单易懂，思维清晰，逻辑顺畅简易，OYeah!!!!!!!
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        float weight=in.nextFloat();
        char ch=in.next().charAt(0);
        int money=20;
        if(weight<=1){
            int addmoney=ch=='y'?5:0;//是否加急的钱
            money+=addmoney;
        }else if(weight>1){
            money+=Math.ceil(weight-1);//向上取整函数的使用，真好用！very good!!
             int addmoney=ch=='y'?5:0;
             money+=addmoney;
        }
        System.out.println(money);
    }
}