喝啤酒问题

public static void main(String[] args) {
        System.out.println(help(8));
    }

    public static int sum = 0;
    public static int help(int money){
        int count = (int) Math.floor(money/2);
        //喝几瓶
        int curPing = count;
        //空瓶数
        int curGai = count;
        //瓶盖数
        helper(money,count,curPing,curGai);
        return sum;
    }
    public static void helper(int money,int count,int curPing,int curGai){
        if(curPing<2&&curGai<4){
            //递归终结条件
            sum = count;
            return;
        }
        if(curGai>=4){
            int curAdd1 = (int) Math.floor(curGai/4);
            count+=curAdd1;
            //增加的瓶子数
            curGai=curAdd1+curGai%4;
            //增加的瓶数＋剩余于的瓶盖；
            curPing+=curAdd1;
        }
        if(curPing>=2){
            int curAdd2 = (int) Math.floor(curPing/2);
            count+=curAdd2;
            curPing=curAdd2+curPing%2;
            //增加的瓶数＋剩余于空瓶；
            curGai+=curAdd2;
        }
        helper(money,count,curPing,curGai);
    }