using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(CheckSectionsIntersect(new []{"U","L","D","D","R","U"},6));

        Console.WriteLine(CheckSectionsIntersect(new []{"D","L","U","L"},4));

    }

    static Dictionary<string,(int X,int Y)> transforms = new Dictionary<string, (int X, int Y)>{

        ["U"] = (0,1),

        ["D"] = (0,-1),

        ["L"] = (-1,0),

        ["R"] = (1,0)

    };

    static bool CheckSectionsIntersect(string[] sectionDirection, int numberOfSections)

    {

        (int X, int Y) pos = (0,0);

        for(var i = 0;i<numberOfSections;i++)

        {

            if(!transforms.TryGetValue(sectionDirection[i], out var transform))

               throw new ArgumentException("sectionDirections");

            pos.X += transform.X;

            pos.Y += transform.Y;

            if(pos.X == 0 && pos.Y == 0)

                return true;                

        }

        return false;

    }

}