Update 0112.路径总和.md

problems/0112.路径总和.md

@@ -1213,6 +1213,28 @@ object Solution {
 }
 ```
 
+## rust
+
+### 112.路径总和.md
+
+```rust
+use std::rc::Rc;
+use std::cell::RefCell;
+impl Solution {
+    pub fn has_path_sum(root: Option<Rc<RefCell<TreeNode>>>, target_sum: i32) -> bool {
+        if root.is_none() {
+            return false;
+        }
+        let node = root.unwrap();
+        if node.borrow().left.is_none() && node.borrow().right.is_none() {
+            return node.borrow().val == target_sum;
+        }
+        return Self::has_path_sum(node.borrow().left.clone(), target_sum - node.borrow().val)
+            || Self::has_path_sum(node.borrow().right.clone(), target_sum - node.borrow().val);
+    }
+}
+```
+
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