题解 | xxx定律

#include <iostream>
using namespace std;

int main() {
    int a;
    while (cin >> a ) { 
        int res = 0;
        while(a!=1){
            if(a%2== 0) { //偶数
                a /= 2;
            }else{ //奇数
                a = (3*a + 1)/2;
            }
            res++;
        }
        cout<<res;
    }
}