using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("program for finding S and P of the trapezoid");

        Console.Write("a:");

         string s = Console.ReadLine();

        int a = int.Parse(s);

         Console.Write("b:");

        s = Console.ReadLine();

        int b = int.Parse(s);

         Console.Write("h:");

        s = Console.ReadLine();

        int h = int.Parse(s);

        Console.Write("c:");

        s = Console.ReadLine();

        int c = int.Parse(s);

​

        Console.WriteLine("P:");

            Console.WriteLine(2*c+(a+b));

        Console.WriteLine("S:");

            Console.WriteLine(h*(a+b)/2);

​

    }

}