#include <iostream>
#include <fstream>
#include <cassert>

#define INPUT_FILE  "input.txt"
#define OUTPUT_FILE "output.txt"

using namespace std;

class Vector {
    private:
        int n;

        float* data;

    public:
        Vector() {
            n = 0;
            data = NULL;
        }

        Vector(int n) { allocate(n); }

        ~Vector() { clear(); }

        void allocate(int n) {
            this->n = n;
            data = new float[n];
        }

        void clear() {
            this->n = 0;
            delete data;
        }

        void read(string filename) {
            ifstream ifs(filename);

            assert(ifs && "File cannot open!!!");

            ifs >> *this;
        }

        float calcAvg() {
            float avg = 0.;

            for (int i = 0; i < n; i++)
                avg += data[i];

            assert(n && "n = 0!!!");

            return avg / n;
        }

        float calcMult() {
            bool flag = false;
            float mult = 1., avg = calcAvg();

            for (int i = 0; i < n; i++)
                if (data[i] > avg) {
                    flag = true;
                    mult *= data[i];
                }
            assert(flag && "There are no elements > avg!!!");

            return mult;
        }

        void write(string filename) {
            ofstream ofs(filename);

            assert(ofs && "File cannot create!!!");

            ofs << *this;
        }

        friend ifstream& operator >> (ifstream& ifs, Vector& x);

        friend ofstream& operator << (ofstream& ofs, Vector& x);

        friend istream& operator >> (istream& is, Vector& x);

        friend ostream& operator << (ostream& os, Vector& x);
};

ifstream& operator >> (ifstream& ifs, Vector& x) {
    ifs >> x.n;
    x.allocate(x.n);

    for (int i = 0; i < x.n; i++)
        ifs >> x.data[i];

    return ifs;
}

ofstream& operator << (ofstream& ofs, Vector& x) {
    ofs << "n = " << x.n << endl;

    if (x.n) {
        ofs << "data: ";
        for (int i = 0; i < x.n; i++)
            ofs << x.data[i] << " ";
        ofs << endl;
    }

    float avg = x.calcAvg();
    float mult = x.calcMult();

    ofs << "avg = " << avg << endl;
    ofs << "mult = " << mult << endl;

    return ofs;
}

ostream& operator << (ostream& os, Vector& x) {
    cout << "n = " << x.n << endl;

    if (x.n) {
        cout << "data: ";
        for (int i = 0; i < x.n; i++)
            cout << x.data[i] << " ";
        cout << endl;
    }

    float avg = x.calcAvg();
    float mult = x.calcMult();

    cout << "avg = " << avg << endl;
    cout << "mult = " << mult << endl;

    return os;
}

istream& operator >> (istream& is, Vector& x) {
    cin >> x.n;
    x.allocate(x.n);

    for (int i = 0; i < x.n; i++)
        cin >> x.data[i];

    return is;
}

int main() {
    Vector x;

    x.read(INPUT_FILE);
    x.write(OUTPUT_FILE);

    cout << x;

    return 0;
}