20240616 Finished

This commit is contained in:
jackfiled 2024-06-16 10:41:43 +08:00
parent f2978f1431
commit ab3380bf47
2 changed files with 77 additions and 1 deletions

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@ -149,4 +149,5 @@ mod p129_sum_root_to_leaf_numbers;
mod p124_binary_tree_maximum_path_sum;
mod p173_binary_search_tree_iterator;
mod p222_count_complete_tree_nodes;
mod p199_binary_tree_right_side_view;
mod p199_binary_tree_right_side_view;
mod p637_average_of_levels_in_binary_tree;

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@ -0,0 +1,75 @@
/**
* [637] Average of Levels in Binary 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;
use std::collections::VecDeque;
impl Solution {
pub fn average_of_levels(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<f64> {
let mut result = vec![];
let mut queue = VecDeque::new();
if let Some(root) = root {
queue.push_back(root);
}
while !queue.is_empty() {
let length = queue.len();
let mut sum = 0f64;
for _ in 0..length {
let node = queue.pop_front().unwrap();
sum += node.borrow().val as f64;
if let Some(left) = &node.borrow().left {
queue.push_back(Rc::clone(left));
};
if let Some(right) = &node.borrow().right {
queue.push_back(Rc::clone(right));
};
}
result.push(sum / length as f64);
}
result
}
}
// submission codes end
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_637() {
}
}