Create 2046-sort-linked-list-already-sorted-using-absolute-values.js

Author: everthis

2046-sort-linked-list-already-sorted-using-absolute-values.js

@@ -0,0 +1,30 @@
+/**
+ * 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 {ListNode}
+ */
+const sortLinkedList = function(head) {
+  if(head == null) return head
+  const dummy = new ListNode(null, head)
+  let pre = dummy, cur = head
+  while(cur) {
+    if(cur.val < 0 && cur !== head) {
+      const tmp = cur.next, tmpHead = dummy.next
+      dummy.next = cur
+      cur.next = tmpHead
+      pre.next = tmp
+      cur = tmp
+    } else {
+      pre = cur
+      cur = cur.next
+    }
+  }
+
+  return dummy.next
+};