#include <iostream>
#include <ctime>
#include <vector>
#include <math.h>

using namespace std;
bool isProst(int n)
{
    for (int i = 2; i * i <= n; i++)
        if (n % i == 0)
        {
            return false;
        }
    return true;
}
class Example
{
public:
    long long int Cx;
    long long int Dx;
    long long int p;

    Example(long long int p)
    {
        p = p;
    }

    void PlayerCxDx()
    {
        //Cx = find_coprime_number(p - 1);
        //Dx = inventor(p - 1, Cx);
    }
};

int main()
{
    srand(time(0));
    long long p;
    long long int range = rand() % (long long)pow(9, 10);
        do
        {
            p = rand() % range;

        } while (isProst(p) == false);

    Example a(p);

    cout << a.p << endl;

    return 0;
}