#include <iostream>
#include <vector>
#include <numeric>
#include <iomanip>

int main() {
    std::vector<int> minutes{10, 11, 12};
    long long total = std::accumulate(minutes.begin(), minutes.end(), 0LL);
    if (minutes.empty()) { return 1; }
    double mean = static_cast<double>(total) / static_cast<double>(minutes.size());
    std::cout << std::fixed << std::setprecision(2) << "total=" << total << " count=" << minutes.size() << " mean=" << mean << '\n';
}