using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Ievadi 1. katetes garumu");

        double a = Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("Ievadi 2. katetes garumu");

        double b = Convert.ToDouble(Console.ReadLine());

        double laukums = (a/2)*b;

        double hipotenuza = (a*a)+(b*b);

        Math.Sqrt(hipotenuza);

        double perimetrs = a+b+hipotenuza;

        Console.WriteLine("Laukuma summa ir " +laukums+ " bet trijstura perimetrs " +perimetrs);

    }

}