5.2 histograma

using System;

public class Program
{
    public static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        double p1Count = 0;
        double p2Count = 0;
        double p3Count = 0;
        double p4Count = 0;
        double p5Count = 0;
        //....................................
        for(int i = 0; i < n; i++)
        {
            int number = int.Parse(Console.ReadLine());
            if (number < 200)
            {
                p1Count++;
            }
            else if (number >= 200 && number <= 399 )
            {
                p2Count++;
            }
            else if (number >= 400 && number <= 599)
            {
                p3Count++;
            }
            else if (number >= 600 && number <= 799)
            {
                p4Count++;
            }
            else
            {
                p5Count++;
            }
        }
        double p1 = (p1Count / n) * 100;
        double p2 = (p2Count/ n) * 100;
        double p3 = (p3Count/ n) * 100;
        double p4 = (p4Count/ n) * 100;
        double p5 = (p5Count/ n) * 100;
        Console.WriteLine("{0:F2}%",p1);
        Console.WriteLine("{0:F2}%",p2);
        Console.WriteLine("{0:F2}%",p3);
        Console.WriteLine("{0:F2}%",p4);
        Console.WriteLine("{0:F2}%",p5);
    }
}