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

void f1()
{
    char c;
 scanf ("%c", &c);
 int dif='a'-'A';
 if (c>='A'&&c<='Z')
        c+=dif;
 printf( "%c",c);
}
void f2()
{
    int a,b;
    char Q;
    scanf ("%d %c %d",&a,&Q,&b);
    switch (Q)
    {
        case '*':printf ("%d",a*b);break;
        case '/':printf ("%d",a/b);break;
        case '+':printf ("%d",a+b);break;
        case '-':printf ("%d",a-b);break;
        case '%':printf("%d",a%b);break;
    default : printf (" \n");
    }
}
 typedef struct
{
  int nrleg;
  char nume;
  float nota_mate;
  float nota_info;
  float medie;
  float nota_bac;
  bool admis;
  bool buget;

}candidat;
void citire(candidat a)
{
    scanf ("%d",&a.nrleg);
    scanf ("%c",&a.nume);
    scanf ("%f",&a.nota_mate);
    scanf ("%d",&a.nota_info);
    scanf ("%d",&a.nota_bac);
    scanf ("%d",&a.nrleg);
    a.medie=(a.nota_info+a.nota_mate)/2;

}
void qsort(void *size_t, int
void medie()
{


    scanf ("%f %f %f",&a.nota_mate,&a.nota_info,&a.nota_bac);
    float medie=(a.nota_info+a.nota_mate)/2;
    a.medie=medie*80/100 + a.nota_bac*20/100;
    printf ("%f",a.medie);
}
int main()
{
    medie();
    return 0;
}