1

Author: Ainevsia

notes/src/day14/lc144.md

@@ -69,3 +69,25 @@ public:
 ```
 
 ## 学习感想
+
+为什么当时没有用rust做呢
+
+```js
+use std::rc::Rc;
+use std::cell::RefCell;
+impl Solution {
+    pub fn preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
+        if let Some(r) = root {
+            // use std::ops::DerefMut;
+            // let mut ref_node: std::cell::RefMut<TreeNode> = r.borrow_mut();
+            // let node: &mut TreeNode = &mut ref_node;
+            let mut res: Vec<i32> = vec![r.borrow().val];
+            res.append(&mut Self::preorder_traversal(r.borrow_mut().left.take()));
+            res.append(&mut Self::preorder_traversal(r.borrow_mut().right.take()));
+            res
+        } else {
+            vec![]
+        }
+    }
+}
+```

notes/src/day9/lc459.md

@@ -74,6 +74,8 @@ abcdabcd
 
 
 ```rust
+struct Solution {}
+
 impl Solution {
     pub fn repeated_substring_pattern(s: String) -> bool {
         let s: Vec<u8> = s.bytes().collect();