ConcertTickets TLE

import java.io.*;
import java.util.*;

public class ConcertTickets {

    static class InputReader {
        BufferedReader reader;
        StringTokenizer tokenizer;

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

        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());
        }
    }

    static InputReader r = new InputReader(System.in);
    static PrintWriter pw = new PrintWriter(System.out);

    static TreeMap<Integer, Integer> prices = new TreeMap<Integer, Integer>();

    public static void main(String[] args) {

        int n = r.nextInt(); // # tickets
        int m = r.nextInt(); // # customers
        for(int i = 1; i <= n; i++){
            add(r.nextInt());
        }
        for(int i = 1; i <= m; i++){
            int c = r.nextInt();

            if(prices.lowerKey(c+1) != null){
                pw.println(prices.lowerKey(c+1));
                remove(prices.lowerKey(c+1));
            } else {
                pw.println(-1);
            }
        }

        pw.close();
    }

    static void add(int val){
        if(prices.containsKey(val)){
            prices.put(val, prices.get(val) + 1);
        } else {
            prices.put(val, 1);
        }
    }

    static void remove(int val){
        prices.put(val, prices.get(val) - 1);
        if(prices.get(val).equals(0)){
            prices.remove(val);
        }
    }
}