题解 | #xxx定律#

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
        int n,ans=0;
        while(scanf("%d",&n)!=EOF){
            if(n==0) break;
            ans=0;
        while(n!=1){
            if(n%2==0){
                n=n/2;
            }else{
                n=(3*n+1)/2;
            }
            ans++;
        }
        printf("%d\n",ans);
        }
}