20240225 Finished
This commit is contained in:
parent
6834721bd6
commit
59e91d5da4
|
@ -51,4 +51,5 @@ mod p102_binary_tree_level_order_traversal;
|
|||
mod p107_binary_tree_level_order_traversal_ii;
|
||||
mod p103_binary_tree_zigzag_level_order_traversal;
|
||||
mod p105_construct_binary_tree_from_preorder_and_inorder_traversal;
|
||||
mod p106_construct_binary_tree_from_inorder_and_postorder_traversal;
|
||||
mod p106_construct_binary_tree_from_inorder_and_postorder_traversal;
|
||||
mod p235_lowest_common_ancestor_of_a_binary_search_tree;
|
|
@ -0,0 +1,58 @@
|
|||
/**
|
||||
* [235] Lowest Common Ancestor of a Binary Search Tree
|
||||
*/
|
||||
pub struct Solution {}
|
||||
|
||||
use crate::util::tree::{TreeNode, to_tree};
|
||||
|
||||
// submission codes start here
|
||||
|
||||
// Definition for a binary tree node.
|
||||
// #[derive(Debug, PartialEq, Eq)]
|
||||
// pub struct TreeNode {
|
||||
// pub val: i32,
|
||||
// pub left: Option<Rc<RefCell<TreeNode>>>,
|
||||
// pub right: Option<Rc<RefCell<TreeNode>>>,
|
||||
// }
|
||||
//
|
||||
// impl TreeNode {
|
||||
// #[inline]
|
||||
// pub fn new(val: i32) -> Self {
|
||||
// TreeNode {
|
||||
// val,
|
||||
// left: None,
|
||||
// right: None
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
use std::rc::Rc;
|
||||
use std::cell::RefCell;
|
||||
impl Solution {
|
||||
pub fn lowest_common_ancestor(root: Option<Rc<RefCell<TreeNode>>>, p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
|
||||
let (root, p, q) = (root?, p?, q?);
|
||||
let mut ancestor = root;
|
||||
|
||||
loop {
|
||||
ancestor = if p.borrow().val < ancestor.borrow().val && q.borrow().val < ancestor.borrow().val {
|
||||
Rc::clone(&ancestor.borrow().left.as_ref().unwrap())
|
||||
} else if (p.borrow().val > ancestor.borrow().val && q.borrow().val > ancestor.borrow().val ) {
|
||||
Rc::clone(&ancestor.borrow().right.as_ref().unwrap())
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
Some(ancestor)
|
||||
}
|
||||
}
|
||||
|
||||
// submission codes end
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_235() {
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user