Update 0654.最大二叉树.md

problems/0654.最大二叉树.md

@@ -511,6 +511,35 @@ object Solution {
 
 ### Rust
 
+新建数组：
+
+```rust
+use std::cell::RefCell;
+use std::rc::Rc;
+impl Solution{
+    pub fn construct_maximum_binary_tree(mut nums: Vec<i32>) -> Option<Rc<RefCell<TreeNode>>> {
+        if nums.is_empty() {
+            return None;
+        }
+        let mut max_value_index = 0;
+        for i in 0..nums.len() {
+            if nums[max_value_index] < nums[i] {
+                max_value_index = i;
+            }
+        }
+        let right = Self::construct_maximum_binary_tree(nums.split_off(max_value_index + 1));
+        let root = nums.pop().unwrap();
+        let left = Self::construct_maximum_binary_tree(nums);
+        Some(Rc::new(RefCell::new(TreeNode {
+            val: root,
+            left,
+            right,
+        })))
+    }
+}
+```
+
+数组索引：
 ```rust
 use std::cell::RefCell;
 use std::rc::Rc;