Update 链表理论基础.md

problems/链表理论基础.md

@@ -220,16 +220,17 @@ class ListNode(_x: Int = 0, _next: ListNode = null) {
 
 Rust:
 ```rust
-pub struct Node<T> {
-    value: T,
-    next: Link<T>,
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct ListNode<T> {
+    pub val: T,
+    pub next: Option<Box<ListNode<T>>>,
 }
 
-type Link<T> = Option<Box<Node<T>>>;
-
-// 附设头节点
-pub struct List<T> {
-    head: Link<T>,
+impl<T> ListNode<T> {
+    #[inline]
+    fn new(val: T, node: Option<Box<ListNode<T>>>) -> Self {
+        ListNode { next: node, val }
+    }
 }
 ```