using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HomeWork
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine();
            var numbers = Console.ReadLine().Split(' ').Select(int.Parse);

            var tokens = input.Split(' ').Select(int.Parse).ToArray();
            var numbersCollection = new Stack<int>(numbers);
            var count = tokens[1];
            var min = 10000000000000;
            for (int i = 0; i < count; i++)
            {
                numbersCollection.Pop();
            }
            if (numbersCollection.Contains(tokens[2]))
            {
                Console.WriteLine("true");
            }
            else
            {
                if (numbersCollection.Count > 0)
                {
                    foreach (var item in numbersCollection)
                    {
                        if (min > item)
                        {
                            min = item;
                        }

                    }
                    Console.WriteLine(min);
                }
                else
                {
                    Console.WriteLine("0");
                }

            }

        }
    }
}