import java.util.Scanner;
public class Main {
public static void f()
{
Scanner in = new Scanner(System.in);
int n = in.nextInt();
in.nextLine();//读走剩下的回车符号
int a[] = new int[100000+1];
int min = Integer.MAX_VALUE;
int max = Integer.MIN_VALUE;
for(int i = 0;i<n;i++)
{
String str = in.nextLine();
String tmp[] = str.split("\\s+");
for(int j = 0;j<tmp.length;j++)
{
int tmpNum = Integer.parseInt(tmp[j]);
if(min>tmpNum)
{
min = tmpNum;
}
if(max<tmpNum)
{
max = tmpNum;
}
a[tmpNum]++;
}
}
int que = 0;
int chong = 0;
for(int i = min+1;i<max;i++)
{
if(a[i]==0)
{
que = i;
}
if(a[i]==2)
{
chong = i;
}
}
System.out.print(que+" ");
System.out.println(chong);
}
public static void main(String[] args) {
f();
}
}
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