题解 | xxx定律 --有scanf("%d",&a)!=EOF

#include "stdio.h"

using namespace std;

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

    }
    return 0;
}