package main

type ListNode struct {
	Val  int
	Next *ListNode
}

func main() {

}
func getIntersectionNode(headA, headB *ListNode) *ListNode {
	Anode, Bnode := headA, headB
	hash := make(map[*ListNode]struct{})

	for Anode != nil {
		hash[Anode] = struct{}{}
		Anode = Anode.Next
	}
	for Bnode != nil {
		if _, ok := hash[Bnode]; ok {
			return Bnode
		}
		Bnode = Bnode.Next
	}

	return nil

}