#include <iostream>
#include <vector>
#include <fstream>
using namespace std;

int main(){
	ios::sync_with_stdio(false);

	fstream f;

	f.open("examene.txt", ios_base::in);

	if(!f.is_open()){
		cout<<"Error: file does not exist";
		return 1;
	}

	int sum=0;
	for(int i=0; i<6; i++){
		int buff;
		f>>buff;
		sum+=buff;
	}

	f.close();

	f.open("media.txt", ios_base::out);

	double avg = (double)sum / 6;

	f<<avg;

	f.close();

	return 0;
}