Language: Java

mport java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;

public class Main {

    static class Task {

        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            long k = in.nextLong();
            int[] arr = new int[n + 1];
            for (int i = 1; i <= n; i++) {
                arr[i] = in.nextInt();
            }

            boolean[] visited = new boolean[n + 1];
            int cur = 1;
            List<Integer> pathList = new ArrayList<>();
            while (!visited[cur]) {
                pathList.add(cur);
                visited[cur] = true;
                cur = arr[cur];
            }

            if (k < pathList.size()) {
                out.println(pathList.get((int) k));
                return;
            }

            int from = 0;
            for (int i = 0; i < pathList.size(); i++) {
                if (pathList.get(i) == cur) {
                    from = i;
                    break;
                }
            }

            k -= from;
            int size = pathList.size() - from;

            int ansIdx = pathList.get((int) (k % size) + from);
            out.println(ansIdx);
        }
    }

    private static void sort(double[] arr) {
        Double[] objArr = Arrays.stream(arr).boxed().toArray(Double[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sort(int[] arr) {
        Integer[] objArr = Arrays.stream(arr).boxed().toArray(Integer[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sort(long[] arr) {
        Long[] objArr = Arrays.stream(arr).boxed().toArray(Long[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void solve() {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task task = new Task();
        task.solve(1, in, out);
        out.close();
    }

    public static void main(String[] args) {
        new Thread(null, () -> solve(), "1", 1 << 26).start();
    }

    static class InputReader {

        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

    }

}


Compiler output:
Main.java:1: error: class, interface, enum, or record expected
mport java.io.*;
^
Main.java:2: error: class, interface, enum, or record expected
import java.util.ArrayList;
^
Main.java:3: error: class, interface, enum, or record expected
import java.util.Arrays;
^
Main.java:4: error: class, interface, enum, or record expected
import java.util.List;
^
Main.java:5: error: class, interface, enum, or record expected
import java.util.StringTokenizer;
^
5 errors