using System;

public class Program

{

    public static void Main()

    {

        var visibleSinks = 20;

        var sq = Math.Sqrt(visibleSinks);

        var dif = Math.Ceiling(sq) - Math.Floor(sq);

        var roundedUp = Math.Ceiling(sq);

        var roundedDown = Math.Floor(sq);

​

        if(roundedUp - roundedDown != 0) {

            if(visibleSinks - roundedDown*roundedDown >= roundedDown){

                var remainder = visibleSinks - ((roundedDown + 1) * roundedDown);

​

                if(remainder == 0){

                    Console.WriteLine("{0} x {1}", roundedDown, roundedDown + 1);

                    return;

                }

                if(remainder == roundedDown) {

                    Console.WriteLine("{0} x {1}", roundedDown, roundedDown + 2);

                    return;

                } 

                Console.WriteLine("{0} x {1} + {2}", roundedDown, roundedDown + 1, remainder);

                return;

​

            } else {

                var remainder = visibleSinks - (roundedDown * roundedDown);

                Console.WriteLine("{0} x {1} + {2}", roundedDown, roundedDown, remainder);

            }

        } else {

            Console.WriteLine("{0} x {1} ", roundedDown, roundedDown);

        }

    }

}