83.删除排序链表中的重复元素.js

/*
 * @lc app=leetcode.cn id=83 lang=javascript
 *
 * [83] 删除排序链表中的重复元素
 */

// @lc code=start
/**
 * Definition for singly-linked list.
 * function ListNode(val) {
 *     this.val = val;
 *     this.next = null;
 * }
 */
/**
 * @param {ListNode} head
 * @return {ListNode}
 */
var deleteDuplicates = function(head) {
    let p = head
    while( p && p.next) {
        if(p.val === p.next.val) {
            p.next = p.next.next
        } else {
            p = p.next
        }
    }
    return head
};
// @lc code=end