160. Intersection of Two Linked Lists

 

 

160. Intersection of Two Linked Lists

 code

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode(int x) : val(x), next(NULL) {}
 * };
 */
class Solution {
public:
    ListNode *getIntersectionNode(ListNode *headA, ListNode *headB) {
        ListNode* a = headA;
        ListNode* b = headB;
        if(a==NULL || b==NULL) return NULL;//
        while(a!=b)
        {
            a = a ? a->next : headB;
            b = b ? b->next : headA;
        }
        return a;//err
    }
};

Hash：

 

 

 

 

1. Leetcode_Intersection of Two Linked Lists;