题解 | #xxx定律#

#include <iostream>
using namespace std;

int steps(int n){
    int res=0;
    while(n!=1){
        if(n%2==0) n/=2;
        else{
            n=3*n+1;
            n/=2;
        }
        res++;
    }
    return res;
}

int main() {
    int n;
    while(cin>>n){
        cout<<steps(n)<<endl;
    }
    return 0;
}