차례차례 연습, 사이다 마시기 문제

import java.util.*;
public class RecursionThreePara {
    public static void main(String[] args){
        System.out.println(" ： ， ，2 ，3 ， ？");
      Scanner scan=new Scanner(System.in);
      System.out.println(" ");
      if(scan.hasNextInt()){
          int i =scan.nextInt();
          int result =Recursion(i,0,0);
          System.out.printf("   %d    ",result);
      }
      else{
          System.out.println(" ");
      }

        Recursion(20,0,0);

    }

    public static int Recursion(int Total,int Bottle,int Caps){
        Bottle=Bottle%2;
        Caps=Caps%3;
        Bottle=Total+Bottle;
        Caps=Total+Caps;
        if(Bottle<2&&Caps<3){
            return Total;
        }
        else{
            return Recursion((Bottle/2+Caps/3),Bottle,Caps)+Total;
        }
    }
}

import java.util.*;
public class RecursionBottle {
    public static void main(String[] args){
        System.out.println(" ， ！");
        System.out.println(" ");
        Scanner scan = new Scanner(System.in);
        if(scan.hasNextInt()){
            int i=scan.nextInt();
            int drink=Recursion(i,0);
            if(drink<=0){
                System.out.println(" ， ");
            }
            else{
                System.out.printf(" %d ",drink);

            }

        }
        else{
            System.out.println(" ， ");
        }


    }

    public static int Recursion(int Bottle,int drinks){
       int bottle=Bottle%3;
       drinks = drinks+(Bottle/3);
       if(Bottle<3){
           return drinks;
        }
       else{
           return Recursion((Bottle/3)+bottle,drinks);
       }

    }
}