Computer Firm

#include <iostream>
#include <string>

using namespace std;

int main() {
    int modelCount, model, rating, sales;
    cin >> modelCount;

    double totalSales = 0, totalRating = 0;

    for (int i = 0; i < modelCount; i++) {
        cin >> model;

        rating = model % 10;
        sales = model / 10;

        totalRating += rating;

        totalSales +=
            (rating == 2 ? 0 :
                rating == 3 ? 0.5 :
                rating == 4 ? 0.7 :
                rating == 5 ? 0.85 : 1) * sales;
    }

    printf("%.2f\n%.2f\n", totalSales, totalRating / modelCount);

    return 0;
}