#include <iostream>
#include <iomanip>
using namespace std;
int main ( ) {
	double getal1, getal2, resultaat;
	cout << "Eerste getal : ";
	cin >> getal1;
	cout << "Tweede getal : ";
	cin >> getal2;
	resultaat = getal1 + getal2;
	cout << "Uitkomt : " << setprecision (2) << setiosflags (ios::fixed|ios::showpoint) << (resultaat/2) << endl;
	return 0;
} //main