题解 | xxx定律

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