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Update 0111.二叉树的最小深度.md

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2022-11-13 23:17:30 +08:00
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commit 8b26d8e193
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problems/0111.二叉树的最小深度.md
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@ -574,37 +574,21 @@ object Solution {
rust:
```rust
impl Solution {
pub fn min_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
return Solution::bfs(root)
}
// 递归
pub fn dfs(node: Option<Rc<RefCell<TreeNode>>>) -> i32{
if node.is_none(){
return 0;
pub fn min_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
if let Some(node) = root {
match (node.borrow().left.clone(), node.borrow().right.clone()) {
(Some(n1), None) => 1 + Self::min_depth(Some(n1)),
(None, Some(n2)) => 1 + Self::min_depth(Some(n2)),
(Some(n1), Some(n2)) => {
1 + std::cmp::min(Self::min_depth(Some(n1)), Self::min_depth(Some(n2)))
}
let parent = node.unwrap();
let left_child = parent.borrow_mut().left.take();
let right_child = parent.borrow_mut().right.take();
if left_child.is_none() && right_child.is_none(){
return 1;
_ => 1,
}
let mut min_depth = i32::MAX;
if left_child.is_some(){
let left_depth = Solution::dfs(left_child);
if left_depth <= min_depth{
min_depth = left_depth
} else {
0
}
}
if right_child.is_some(){
let right_depth = Solution::dfs(right_child);
if right_depth <= min_depth{
min_depth = right_depth
}
}
min_depth + 1
}
// 迭代
pub fn bfs(node: Option<Rc<RefCell<TreeNode>>>) -> i32{