import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
 
 class Solution {
 
    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
         Scanner sc = new Scanner(System.in);
    int n=sc.nextInt();
    int m=sc.nextInt();
    int N=n+m;
    int a[] = new int [N];
    //int b[][] = new int[m][n];
 
    for(int i=0;i<N;i++)
    {
       a[i]=sc.nextInt();
    }
    Arrays.sort(a);
    int ans=(N)/2;
    System.out.println(a[ans]);
    sc.close();
    }
}

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5 6
-5 3 6 12 15
-12 -10 -6 -3 4 10