题解 | #输出单向链表中倒数第k个结点#

# -*-coding:utf-8-*-

while True:
    try:
        input_n = int(input())
        input_ss = list(input().split(" "))
        input_k = int(input())
        if input_ss[-input_k] and input_k !=0:
            print(input_ss[-input_k])
        else:print('0')
    except:
        break