Create 2130-maximum-twin-sum-of-a-linked-list.js

Author: everthis

2130-maximum-twin-sum-of-a-linked-list.js

@@ -0,0 +1,27 @@
+/**
+ * Definition for singly-linked list.
+ * function ListNode(val, next) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.next = (next===undefined ? null : next)
+ * }
+ */
+/**
+ * @param {ListNode} head
+ * @return {number}
+ */
+const pairSum = function(head) {
+   const arr = []
+   let cur = head
+   
+   while(cur) {
+     arr.push(cur.val)
+     cur = cur.next
+   }
+  
+   let res = 0
+   for(let i = 0, n = arr.length; i < n / 2; i++) {
+     res = Math.max(res, arr[i] + arr[n - 1 - i])
+   }
+   
+   return res
+};