Leetcode 83. Remove Duplicates from Sorted List

https://leetcode.com/problems/remove-duplicates-from-sorted-list/

# T:O(n) S:O(1)
class Solution:
    # @param head, a ListNode
    # @return a ListNode
    def deleteDuplicates(self, head):
        current = head
        while current and current.next:
            next = current.next
            if current.val == next.val:
                current.next = current.next.next
            else:
                current = next
        return head

Run Time: 92 ms