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;
}
}
