题解 | xxx定律

#include <stdio.h>
using namespace std;

int main(){
    int n;
    while(scanf("%d", &n) != EOF){
        int count = 0;
        while(n != 1){
            if(0 == n % 2){
                n = n / 2;
            }
            else{
                n = (n * 3 + 1) / 2;
            }
            count++;
        }
        printf("%d\n", count);
    }
    return 0;
}