在我提交的时候，会出现这个：

UnexpectedResponseStatus: expect status code: 301 Moved Permanently on https://onlinejudge.org/index.php?option=com_comprofiler&task=login, got: 200 OK

#include <iostream>
using namespace std;
int main()
{
    int x;
    cin >> x;
    cout << x / 2 * 3 + x % 2 << endl;
    return 0;
}