# Definition for singly-linked list. # class ListNode(object): # def __init__(self, x): # self.val = x # self.next = None class Solution(object): def getIntersectionNode(self, headA, headB): """ :type head1, head1: ListNode :rtype: ListNode """ if headA == None or headB == None: return None pa, pb = headA, headB while pa!=pb: if pa == None: pa = headB else: pa = pa.next if pb == None: pb = headA else: pb = pb.next return pa
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