每日一九度之 题目1031：xxx定律

//Asimple
#include <iostream>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <cctype>
#include <cstdlib>
#include <stack>
#include <cmath>
#include <map>
#include <string>
#include <queue>
#define INF 100000
using namespace std;
const int maxn = 1005;
typedef long long ll;
int n;

int fun(int n, int cnt){
    if( n == 1 ) return cnt;
    else if( n & 1 ){
        n = 3 * n + 1 ;
        n /= 2 ;
        fun(n,cnt+1);
    } else {
        n /= 2 ;
        fun(n,cnt+1);
    }
}

int main(){
    while( scanf("%d",&n) && n ){
        int cnt = 0;
        cout << fun(n,cnt) << endl ;
    }
    return 0;
}