SRBD E: Building a Research and Development Center

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Roy
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        OutputWriter out = new OutputWriter(outputStream);
        BuildingAResearchAndDevelopmentCenter solver = new BuildingAResearchAndDevelopmentCenter();
        solver.solve(1, in, out);
        out.close();
    }

    static class BuildingAResearchAndDevelopmentCenter {
        public void solve(int testNumber, InputReader in, OutputWriter out) {
            int n = in.readInteger();
            int q = in.readInteger();
            int[] seniority = new int[n];
            for (int i = 0; i < n; i++) {
                int id = in.readInteger();
                seniority[id] = n - i;
            }
            DisjointSetUnion dsu = new DisjointSetUnion(n, seniority);

            for (int i = 0; i < q; i++) {
                int query = in.readInteger();
                if (query == 1) {
                    int id1 = in.readInteger();
                    int id2 = in.readInteger();
                    dsu.union(id1, id2);
                } else if (query == 2) {
                    int id = in.readInteger();
                    seniority[id]++;

                    int parent = dsu.find(id);
                    int seniorId = dsu.getSenior(parent);

                    if (seniority[id] > seniority[seniorId]) dsu.setSenior(parent, id);
                    else if (seniority[seniorId] == seniority[seniorId]) dsu.setSenior(parent, Math.max(id, seniorId));
                } else {
                    out.printLine(dsu.getSenior(in.readInteger()));
                }
            }
        }

    }

    static class DisjointSetUnion {
        int[] senior;
        int[] seniority;
        private List<Integer> link;
        private List<Integer> size;

        private void init(int nodes) {
            for (int i = 0; i < nodes; i++) {
                this.senior[i] = i;
                link.add(i);
                size.add(1);
            }
        }

        public DisjointSetUnion(int nodes, int[] seniority) {
            link = new ArrayList<>();
            size = new ArrayList<>();
            senior = new int[nodes];
            this.seniority = seniority;
            this.init(nodes);
        }

        public int find(int node) {
            if (node == link.get(node)) return node;

            link.set(node, find(link.get(node)));
            return link.get(node);
        }

        public int getSenior(int id) {
            return senior[id] = senior[find(id)];
        }

        public void setSenior(int id, int who) {
            this.senior[id] = who;
        }

        public void union(int firstNode, int secondNode) {
            firstNode = find(firstNode);
            secondNode = find(secondNode);

            if (size.get(firstNode) < size.get(secondNode))
                firstNode = Swap.between(secondNode, secondNode = firstNode);
            size.set(firstNode, size.get(firstNode) + size.get(secondNode));
            link.set(secondNode, firstNode);

            int sn;
            if (seniority[firstNode] > seniority[secondNode]) sn = firstNode;
            else if (seniority[firstNode] == seniority[secondNode]) {
                sn = Math.max(firstNode, secondNode);
            } else sn = secondNode;
            senior[firstNode] = senior[secondNode] = sn;
        }

    }

    static class InputReader {
        private int curChar;
        private int numChars;
        private InputReader.SpaceCharFilter filter;
        private final InputStream stream;
        private final byte[] buf = new byte[1024];

        public InputReader(InputStream stream) {
            this.stream = stream;
        }

        private long readWholeNumber(int c) {
            long res = 0;
            do {
                if (c < '0' || c > '9') {
                    throw new InputMismatchException();
                }
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res;
        }

        public int read() {
            if (numChars == -1) {
                throw new InputMismatchException();
            }
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);

                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (numChars <= 0) {
                    return -1;
                }
            }
            return buf[curChar++];
        }

        public int readInteger() {
            int c = read();
            while (isSpaceChar(c)) {
                c = read();
            }
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            int res = (int) readWholeNumber(c);
            return res * sgn;
        }

        public boolean isSpaceChar(int c) {
            if (filter != null) {
                return filter.isSpaceChar(c);
            }
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

        public interface SpaceCharFilter {
            boolean isSpaceChar(int ch);

        }

    }

    static class Swap {
        public static <T> T between(T a, T b) {
            return a;
        }

    }

    static class OutputWriter {
        private final PrintWriter writer;

        public OutputWriter(OutputStream outputStream) {
            writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
        }

        public OutputWriter(Writer writer) {
            this.writer = new PrintWriter(writer);
        }

        public void print(Object... objects) {
            for (int i = 0; i < objects.length; i++) {
                if (i != 0) {
                    writer.print(' ');
                }
                writer.print(objects[i]);
            }
        }

        public void printLine(Object... objects) {
            this.print(objects);
            writer.println();
        }

        public void close() {
            writer.flush();
            writer.close();
        }

    }
}