删除排序链表中的重复元素

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

def solve():
    def deleteDuplicates(head):
        curr = head
        while curr and curr.next:
            if curr.val == curr.next.val:
                curr.next = curr.next.next
            else:
                curr = curr.next
        return head
    head = ListNode(1, ListNode(1, ListNode(2, ListNode(3, ListNode(3)))))
    result = deleteDuplicates(head)
    vals = []
    while result:
        vals.append(result.val)
        result = result.next
    print(vals)