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create 0226 invert binary tree in rust #2493

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create 0226 invert binary tree in rust #2493

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20 changes: 20 additions & 0 deletions rust/0226-invert-binary-tree.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
use std::rc::Rc;
use std::cell::RefCell;
impl Solution {
pub fn invert_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
if root == None {
return None;
}

let mut temp = root.clone();
let mut root_ref = temp.as_mut().unwrap().borrow_mut();

let left = root_ref.left.take();
let right = root_ref.right.take();

root_ref.left = Solution::invert_tree(right);
root_ref.right = Solution::invert_tree(left);

root
}
}