5.11 №1 (stack) (Olya)

#include <iostream>
#include <algorithm>
#include <fstream>
#include <string>
#include <stack>
using namespace std;
ifstream in("input.txt");
ofstream out("output.txt");



int main()
{

    stack<int> s;
    int cnt, sum;
    cnt = sum = 0;
    while (in.peek() != EOF)
    {
        int cur; in >> cur;
        if (cur % 2 == 0)
        {
            s.push(cur);
            cnt++;
            sum += cur;
        }
    }
    out << "AVG : " << 1.*sum / cnt << endl;
    while (!s.empty())
    {
        int cur = s.top(); s.pop();
        out << cur << " ";
    }
    //
    //  12 54 3 51 8 4 3 84 2 42 3 4 5 2
    //
}