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

int main() {
    //ifstream File("file.txt");
    istream &File = cin;
    if (true/*File.is_open()*/) {
        int num, count = 0, sum = 0;
        while (File >> num) {
            ++count;
            sum += num;
        }
        if (File.eof()) {
            cout << "count: " << count << endl;
            cout << "sum: " << sum << endl;
            if (count != 0) {
                int average = sum / count;
                cout << "average: " << average << endl;
            }
        }
        else {
            cerr << "File read error" << endl;
        }
    }
    else {
        cerr << "File open error" << endl;
    }
    return 0;
}