public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

int n1 = scanner.nextInt();

int[] a1 = new int[n1];

for (int i = 0; i < n1; i++) {

a1[i] = scanner.nextInt();

}

int n2 = scanner.nextInt();

int[] a2 = new int[n2];

for (int i = 0; i < n2; i++) {

a2[i] = scanner.nextInt();

}

ArrayList<Integer> dq = new ArrayList<>();

for (int i = 0, j = 0; i < n1 && j < n2; i++, j++) {

if (a1[i] < a2[j]) {

dq.add(a1[i]);

i++;

} else if (a1[i] > a2[j]) {

dq.add(a2[j]);

j++;

} else {

dq.add(a1[i]);

i++;

j++;

}

}

if (dq.size() % 2 == 1) {

System.out.println(dq.get(dq.size()/2+1));

}else {

System.out.println((dq.get(dq.size()/2)+dq.get(dq.size()/2+1))/2);

}

}