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 Back_2075 {
    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st;
        int n = Integer.parseInt(br.readLine());

        PriorityQueue<Integer> pq = new PriorityQueue<Integer>(Collections.reverseOrder());

        for (int i = 0; i < n; i++) {
            st = new StringTokenizer(br.readLine()," ");
            for (int j = 0; j < n; j++) {
                int num = Integer.parseInt(st.nextToken());
                pq.offer(num);
            }
        }

        for (int i = 0; i < n - 1; i++) {
            pq.poll();
        }
        System.out.println(pq.poll());
    }
}