using System;

public class Program

{

    public static void Main()

    {

        string s;

        double a,b,h,laukums,skaitlis; 

        Console.WriteLine("skaitlis");

        s=Console.ReadLine();

        skaitlis=double.Parse(s);

        if(skaitlis<=1)

        {

            Console.WriteLine("ievadiet a un b");

            s=Console.ReadLine();

            a=double.Parse(s);

            s=Console.ReadLine();

            b=double.Parse(s);

            taisnsturis(a, b);

        }   

            else if(skaitlis<=2)

        {

            Console.WriteLine("ievadiet a");

            s=Console.ReadLine();

            a=double.Parse(s);

            kvadrats (a); 

        }

    }

        static void taisnsturis (double a, double b)

        {

            double laukums;

            laukums=a*b;

            Console.WriteLine("taisnsturis:"+laukums);

        }

        static void kvadrats (double a, double b) 

        {

            double laukums;

            laukums=a*a;

            Console.WriteLine("kvadrāts:"+laukums);

        }

​

​

}

​

​