Update 链表理论基础 about rust

problems/链表理论基础.md

@@ -218,6 +218,21 @@ class ListNode(_x: Int = 0, _next: ListNode = null) {
 }
 ```
 
+Rust:
+```rust
+pub struct Node<T> {
+    value: T,
+    next: Link<T>,
+}
+
+type Link<T> = Option<Box<Node<T>>>;
+
+// 附设头节点
+pub struct List<T> {
+    head: Link<T>,
+}
+```
+
 
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