C-将元素添加到链表数组中的奇数索引时发生内存泄漏，但不是偶数

class ListNode:
    def __init__(self, value=0, next=None):
        self.value = value
        self.next = next

def add_to_list(head, index, value):
    if index % 2 == 1:
        new_node = ListNode(value)
        new_node.next = head
        return new_node
    else:
        current = head
        for _ in range(index):
            if current is None:
                break
            current = current.next
        if current is not None:
            new_node = ListNode(value, current.next)
            current.next = new_node
    return head

def delete_list(head):
    while head:
        temp = head
        head = head.next
        del temp

try:
    # 添加元素的代码
finally:
    # 释放资源的代码