#include <stdio.h>
int main ()
{

    int a,b;
    float sonuc;

    printf("Lutfen 2 Rakam Giriniz\n");
    scanf("%d %d",&a,&b);

    sonuc=(float) (a+b) / 2 ;

    printf("iki sayinin ortalamasi %.2lf\n",sonuc);

    return 0;
}