using System;
class QBR
{
    public static void Main()
    {
        start:
        string Completions, Attempts, Touchdowns, Interceptions, Yards;
        double completions, attempts, touchdowns, interceptions, yards;

        Console.Write("Completions: ");
        Completions = Console.ReadLine();
        double.TryParse(Completions, out completions);

        Console.Write("Attempts: ");
        Attempts = Console.ReadLine();
        double.TryParse(Attempts, out attempts);

        Console.Write("Touchdowns: ");
        Touchdowns = Console.ReadLine();
        double.TryParse(Touchdowns, out touchdowns);

        Console.Write("Interceptions: ");
        Interceptions = Console.ReadLine();
        double.TryParse(Interceptions, out interceptions);

        Console.Write("Yards: ");
        Yards = Console.ReadLine();
        double.TryParse(Yards, out yards);

        double a, b, c, d, rating, finalrating;
        a = (((completions / attempts) * 100) - 30) / 20.0;
        b = ((touchdowns / attempts) * 100) / 5.0;
        c=(9.5-((interceptions/attempts)*100))/4.0;
        d=((yards/attempts)-3)/4.0;
        rating = ((a+b+c+d)/6.0)*100;
        finalrating = Math.Round(rating, 1);
        if (finalrating > 158.3)
        {
            Console.WriteLine("Error: Invalid Data");
                goto start;
        }
        if (finalrating < 0)
        {
            Console.WriteLine("Error: Invalid Data");
            goto start;
        }
        else
        {
            Console.WriteLine("Quarterback Rating: {0}", finalrating);
            goto start;
        }
    }
}