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Main.java
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Main.java
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/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) {
* val = x;
* next = null;
* }
* }
*/
public class Solution {
public ListNode getIntersectionNode(ListNode headA, ListNode headB) {
if(headA == null)
return null;
ListNode last = headA;
ListNode slow = headB;
ListNode fast = headB;
while(last.next != null)
last = last.next;
last.next = headA;
while(fast != null && fast.next != null) {
slow = slow.next;
fast = fast.next.next;
if(slow == fast)
break;
}
if(fast == null || fast.next == null) {
last.next = null;
return null;
}
slow = headB;
while(slow != fast) {
slow = slow.next;
fast = fast.next;
}
last.next = null;
return slow;
}
}