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Update 0111.二叉树的最小深度.md

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2022-11-13 23:22:47 +08:00
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problems/0111.二叉树的最小深度.md
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@ -591,33 +591,30 @@ impl Solution {
} }
// 迭代 // 迭代
pub fn bfs(node: Option<Rc<RefCell<TreeNode>>>) -> i32{ pub fn min_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
let mut min_depth = 0; let mut res = 0;
if node.is_none(){ let mut queue = VecDeque::new();
return min_depth if root.is_some() {
queue.push_back(root);
} }
let mut stack = vec![node.unwrap()]; while !queue.is_empty() {
while !stack.is_empty(){ res += 1;
min_depth += 1; for _ in 0..queue.len() {
let num = stack.len(); let node = queue.pop_front().unwrap().unwrap();
for _i in 0..num{ if node.borrow().left.is_none() && node.borrow().right.is_none() {
let top = stack.remove(0); return res;
let left_child = top.borrow_mut().left.take();
let right_child = top.borrow_mut().right.take();
if left_child.is_none() && right_child.is_none(){
return min_depth;
} }
if left_child.is_some(){ if node.borrow().left.is_some() {
stack.push(left_child.unwrap()); queue.push_back(node.borrow().left.clone());
} }
if right_child.is_some(){ if node.borrow().right.is_some() {
stack.push(right_child.unwrap()); queue.push_back(node.borrow().right.clone());
} }
} }
} }
min_depth res
}
} }
``` ```
<p align="center"> <p align="center">