#include <iostream>
#include <cmath>
#include <fstream>
 
using namespace std;
 
int main()
{
ifstream f("1.txt");
ifstream g("2.txt");
ofstream h("3.txt");
double a, b, c;
while(!f.eof())
{
f >> a;
g >> b;
c = (a + b) / 2;
h << c << " ";
}
f.close();
g.close();
h.close();
system("pause"); 
return 0;   
}