#include <stdio.h>
#include <stdlib.h>

int main()
{
  int suma = 0;
  int pocet = 0;
  int cislo;
  
  scanf("%d", &cislo);
  while (cislo != 0)
  {
    suma = suma + cislo;
    pocet = pocet + 1;
    scanf("%d", &cislo);      
  }
  
  printf("Soucet: %f\n", suma / (float)pocet);
  system("pause");
}