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

int main() {
    int n;
    cout << "enter number of elements\n"; cin >> n;
    vector<int> ar(n);
    for (int i = 0; i < n; ++i) cin >> ar[i];

    long long sum = 0;
    for (int i = 0; i < n; ++i)
    {
        if (ar[i] % 2 == 0)
        {
            sum += ar[i];
            printf("num: %12d| pos: %d\n", ar[i], i + 1);
        }
    }
    cout << "sum = " << sum;
}