[백준] 2075번 N번째 큰 수

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collections;
import java.util.PriorityQueue;
import java.util.StringTokenizer;
public class Main {
    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<>(Collections.reverseOrder());	
    	
        for (int i = 0; i < N; i++) {
            StringTokenizer st = new StringTokenizer(br.readLine());
            while (st.hasMoreTokens()) {
                pq.offer(Integer.parseInt(st.nextToken()));
            }
        }
    	int answer = Integer.MIN_VALUE;
    	
    	for(int i=0; i<N ;i++) {
    		answer = pq.poll();
    	}
    	
    	System.out.println(answer);
    	
    	
    }

}