如何逆序返回所有链表整数组成的字符串？

# 链表节点的定义
class ListNode:
    def __init__(self, value):
        self.val = value
        self.next = None

# 辅助函数，逆序连接整数值
def reverseList(head):
    if not head:
        return ""
    
    current = head
    result = ""
    
    while current:
        result = str(current.val) + result
        current = current.next
    
    return result

# 创建链表并添加值
def createLinkedList(nums):
    if not nums:
        return None
    
    head = ListNode(nums[0])
    current = head
    
    for i in range(1, len(nums)):
        current.next = ListNode(nums[i])
        current = current.next
    
    return head

# 测试示例
nums = [1, 2, 3, 4, 5]
head = createLinkedList(nums)
result = reverseList(head)
print(result)