using System;

public class Program

{

    public static void Main()

    {

        int r=10;

        int a=90;

        double oabp=(a*3.14*r*r)/360;

        double oab=(1*r*r)/2;

        double segment=oabp-oab;

        double majorsector=((360-a)*3.14*r*r)/360;

        Console.WriteLine("oabp is"+oabp);

        Console.WriteLine("majorsector is"+majorsector);

    }

}