백준 2075 N번째 큰 수

package practice;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Comparator;
import java.util.PriorityQueue;
import java.util.StringTokenizer;

public class Boj2075 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

        PriorityQueue<Integer> pq = new PriorityQueue<>(Comparator.reverseOrder());
        for(int i = 0 ; i < n ; i ++){
            StringTokenizer st = new StringTokenizer(br.readLine(), " ");
            while(st.hasMoreTokens()) {
                pq.offer(Integer.parseInt(st.nextToken()));
            }
        }
        for(int i = 0 ; i < n-1 ; i ++) {
            pq.poll();
        }
        System.out.println(pq.poll());
    }
}