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Merge pull request #1766 from Jack-Zhang-1314/patch-22
Update 0513.找树左下角的值.md about rust
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@ -580,6 +580,77 @@ object Solution {
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}
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```
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### rust
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**层序遍历**
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```rust
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use std::cell::RefCell;
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use std::collections::VecDeque;
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use std::rc::Rc;
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impl Solution {
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pub fn find_bottom_left_value(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
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let mut queue = VecDeque::new();
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let mut res = 0;
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if root.is_some() {
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queue.push_back(root);
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}
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while !queue.is_empty() {
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for i in 0..queue.len() {
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let node = queue.pop_front().unwrap().unwrap();
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if i == 0 {
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res = node.borrow().val;
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}
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if node.borrow().left.is_some() {
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queue.push_back(node.borrow().left.clone());
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}
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if node.borrow().right.is_some() {
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queue.push_back(node.borrow().right.clone());
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}
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}
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}
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res
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}
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}
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```
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**递归**
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```rust
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use std::cell::RefCell;
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use std::rc::Rc;
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impl Solution {
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//*递归*/
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pub fn find_bottom_left_value(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
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let mut res = 0;
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let mut max_depth = i32::MIN;
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Self::traversal(root, 0, &mut max_depth, &mut res);
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res
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}
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fn traversal(
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root: Option<Rc<RefCell<TreeNode>>>,
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depth: i32,
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max_depth: &mut i32,
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res: &mut i32,
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) {
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let node = root.unwrap();
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if node.borrow().left.is_none() && node.borrow().right.is_none() {
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if depth > *max_depth {
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*max_depth = depth;
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*res = node.borrow().val;
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}
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return;
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}
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if node.borrow().left.is_some() {
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Self::traversal(node.borrow().left.clone(), depth + 1, max_depth, res);
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}
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if node.borrow().right.is_some() {
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Self::traversal(node.borrow().right.clone(), depth + 1, max_depth, res);
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}
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}
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}
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```
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<p align="center">
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<a href="https://programmercarl.com/other/kstar.html" target="_blank">
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<img src="../pics/网站星球宣传海报.jpg" width="1000"/>
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