diff options
Diffstat (limited to 'max_diff_node_ancestor.rs')
-rw-r--r-- | max_diff_node_ancestor.rs | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/max_diff_node_ancestor.rs b/max_diff_node_ancestor.rs deleted file mode 100644 index 671bd27..0000000 --- a/max_diff_node_ancestor.rs +++ /dev/null @@ -1,61 +0,0 @@ -use std::cmp; -use std::rc::Rc; -use std::cell::RefCell; - -#[derive(Debug, PartialEq, Eq)] -pub struct TreeNode { - pub val: i32, - pub left: Option<Rc<RefCell<TreeNode>>>, - pub right: Option<Rc<RefCell<TreeNode>>> -} - -struct MinMax { - min: i32, - max: i32, - ans: i32 -} - -impl TreeNode { - #[inline] - pub fn new(val: i32) -> Self { - TreeNode { - val, - left: None, - right: None - } - } -} - -impl Solution { - fn minMax(node_ref: Rc<RefCell<TreeNode>>) -> MinMax { - let node = node_ref.borrow(); - let mut a = MinMax { - min: node.val, - max: node.val, - ans: 0 - }; - if node.left.is_none() && node.right.is_none() { - a - } else { - let children = vec![&node.left, &node.right]; - for child_option in children.iter() { - if let Some(child) = child_option { - let c = Self::minMax(Rc::clone(&child)); - a.ans = cmp::max(a.ans, c.ans); - a.ans = cmp::max(a.ans, (node.val - c.min).abs()); - a.ans = cmp::max(a.ans, (node.val - c.max).abs()); - a.min = cmp::min(a.min, c.min); - a.max = cmp::max(a.max, c.max); - } - } - a - } - } - pub fn max_ancestor_diff(root: Option<Rc<RefCell<TreeNode>>>) -> i32 { - if let Some(node_ref) = root { - Self::minMax(Rc::clone(&node_ref)).ans - } else { - panic!("bad input"); - } - } -} |