if __name__ == '__main__':
    n = int(input())
    arr = map(int, input().split())
    
    lst_scores = sorted(list(arr), reverse=True)

    for i in range(1, n): # we can skip the position 0 as that is the max since list is sorted in desc order
        if lst_scores[i] < lst_scores[0]: # lst_scores[0] is max
            v_runner_up = lst_scores[i] # if the above condition is true then we set the v_runner_up to the 2nd highest
            break
    print(v_runner_up)