def test3(self): node1 = ListNode(1) node2 = ListNode(2) node3 = ListNode(3) node4 = ListNode(4) node5 = ListNode(5) node6 = ListNode(6) node7 = ListNode(7) node8 = ListNode(8) node9 = ListNode(9) node10 = ListNode(10) node11 = ListNode(11) node12 = ListNode(12) node13 = ListNode(13) node13 = ListNode(13) node1.next = node2 node2.next = node3 node3.next = node4 node4.next = node5 node5.next = node6 node6.next = node1 node7.next = node8 node8.next = node9 node9.next = node10 node10.next = node11 node11.next = node12 node12.next = node13 node12.next = node7 s = Solution() res = s.is_interset(node1, node7) print res self.assertFalse(res)