打卡第一天-3-饮料换购

[Devoted～]

import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int num = scan.nextInt();
        for(int i=3;i<=num;i+=3){
          num++;
        }
        System.out.println(num);
        scan.close();
    }
}