using System;
using System.Collections.Generic;
using System.Linq;

namespace Exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var stack = new Stack<int>();
            int[] numbers = new int[input[0]];
            numbers = Console.ReadLine().Split().Select(int.Parse).ToArray();

            foreach (var num in numbers)
            {
                stack.Push(num);
            }


            for (int i = 0; i < input[1]; i++)
            {
                stack.Pop();
            }

            if (stack.Contains(input[2]))
            {
                Console.WriteLine("true");
            }
            else
            {

              if (stack.Count != 0)
              {
                  Console.WriteLine(stack.Min());
              }
              else
              {
                 Console.WriteLine(0);
              }

            }
        }
    }
}