汽水瓶

#include<iostream>using namespace std;int judge(int n);int main(){    int n;    while(cin>>n){        if(n == 0) break;        int result = judge(n);        cout<<result<<endl;    }}int judge(int n){    int rest = n;    int sum = 0;    while(rest > 1){        if(rest == 2){            sum = sum + 1;            return sum;        }        sum = sum + rest/3;        rest = rest/3 + rest%3;    }    return sum;}