using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using static System.Console;
using static System.Math;

namespace Atcoder
{
    class Program
    {
        static StreamWriter sw = new StreamWriter(OpenStandardOutput()) { AutoFlush = false };
        static void Main(string[] args)
        {
            try
            {
                SetOut(sw);
                Solve.Answer();
                Out.Flush();
            }
            catch (Exception ex)
            {
                WriteLine(ex.ToString());
            }
        }
    }

    public class Solve
    {
        public static void Answer()
        {
            var nk = IO.RSLong;
            var a = IO.RSInt;

            //var nk = new long[] { 200000, 100000000000000000 };
            //var a = new int[nk[0]];
            //for (int i = 0; i < a.Length; i++)
            //{
            //    a[i] = a.Length - 1;
            //}

            var visited = new List<int>();
            visited.Add(1);
            int now = 1;
            int roop;
            int firstRoopPoint;
            var hash = new HashSet<int>();
            hash.Add(now);
            while (true)
            {
                now = a[now - 1];
                if (!hash.Add(now))
                {
                    firstRoopPoint = visited.IndexOf(now);
                    roop = visited.Count - firstRoopPoint;
                    break;
                }
                else
                {
                    visited.Add(now);
                }
            }

            if (nk[1] <= firstRoopPoint)
            {
                WriteLine(visited[(int)nk[1]]);
                return;
            }
            else
            {
                long add = (nk[1] - firstRoopPoint) % roop;
                WriteLine(visited[firstRoopPoint + (int)add]);
                return;
            }
        }
    }

    public class IO
    {
        #region Input
        public static int RInt => int.Parse(ReadLine());
        public static long RLong => long.Parse(ReadLine());
        public static double RDouble => double.Parse(ReadLine());

        public static string[] RSString => ReadLine().Split();
        public static int[] RSInt => ReadLine().Split().Select(s => int.Parse(s)).ToArray();
        public static long[] RSLong => ReadLine().Split().Select(s => long.Parse(s)).ToArray();
        public static double[] RSDouble => ReadLine().Split().Select(s => double.Parse(s)).ToArray();
        #endregion

        #region Output
        public static void OutJoinSpace<T>(IEnumerable<T> list) => WriteLine(string.Join(" ", list));
        public static void WriteLineYes_or_No(bool flag) => WriteLine(flag ? "Yes" : "No");
        public static void WriteLineYES_or_NO(bool flag) => WriteLine(flag ? "YES" : "NO");
        #endregion
    }

    public class Mod
    {
        #region
        private readonly static long M = 1000000007;

        public static long Add(long a, long b) => (a * b) % M;
        public static long Sub(long a, long b) => (a - b) % M >= 0 ? (a - b) % M : (a - b) % M + M;
        public static long Multi(long a, long b) => (a * b) % M;
        #endregion
    }
}

Measured memory_bytes: 51568