if __name__ == '__main__':
    n = int(input())
    arr = map(int, input().split())
    scores = list(set(arr))
    if n < 2 and n > 10:
        print("Invalid input: n must be between 2 and 10")
    for i in range(len(scores)):
        if scores[i] < -100 or scores[i] > 100:
            print("Invalid input: scores must be between -100 and 100")
            break
    scores.sort()
    print(scores[-2] if len(scores) > 1 else scores[0])