//Title of this code

#include  <stdio.h>

int main(void)
{
    long suma;
    short n;
    short nota;
    
    suma = n = 0;
   
    do
    {
        printf("\nNota ---> ");
        scanf(" %hd", &nota);
        if(nota < 0) { break; }
        if(nota <= 10)
        {
            suma += nota;
            n++;
        }
    }while(1);
    if(n != 0) 
    { 
        printf("La media es %.2lf\n\n", (double)suma / n);
    }
    else
    {
        printf("Campeón! No has metido notassshh...\n\n");
    }
    return 0;
}