if __name__ == '__main__':
    n = int(input())
    arr = map(int, input().split())
    
    stored_list = list(arr)
    
    stored_list.sort(reverse=True)
    
    counter = 1
    for i in stored_list:
        if stored_list[counter]<i:
            print(stored_list[counter])
            break
        else:
            counter+=1