题解 | #xxx定律#

#include <iostream>

using namespace std;


int main(){
	int n;
	
	while(cin >> n){
		int sum = 0;
		while(n != 1){
			if(n % 2 == 0){
				n = n / 2;
			}else{
				n = 3 * n + 1;
				n = n / 2;
			}
			sum ++;
		}
		cout << sum << endl;
	}
	return 0;
}