#include <iostream>

using namespace std;

int main()

{

  int mult = 1;

  for(int i = -6; i <= 5; i++)

      if(i != 0)

          mult *= i;

  cout << mult;

 return 0;

}

////////////////////////

#include <iostream>

using namespace std;

int main()

{

  float num;

  int counter = 0;

  float sum = 0;

  while(cin >> num)

  {

      sum += num;

      counter++;

  }

  cout << sum / counter;

  return 0;

}