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author | Jack Sangdahl <[email protected]> | 2025-03-10 00:36:13 -0600 |
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committer | Jack Sangdahl <[email protected]> | 2025-03-10 00:36:13 -0600 |
commit | 7c60dee83b436e8e8a667bf9f191beced8de4fc3 (patch) | |
tree | eb7a24ee2067f92245c57bb118e85a1baf15df50 /other/max_width_binary_tree.cpp | |
parent | 5d7cdc215e4ba1ec4cbb24c084cccb5e5e641468 (diff) | |
download | leetcode-7c60dee83b436e8e8a667bf9f191beced8de4fc3.tar.gz leetcode-7c60dee83b436e8e8a667bf9f191beced8de4fc3.zip |
chore: move cpp and rust code to directory
Diffstat (limited to 'other/max_width_binary_tree.cpp')
-rw-r--r-- | other/max_width_binary_tree.cpp | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/other/max_width_binary_tree.cpp b/other/max_width_binary_tree.cpp new file mode 100644 index 0000000..3f69177 --- /dev/null +++ b/other/max_width_binary_tree.cpp @@ -0,0 +1,40 @@ +// 662. Maximum Width of Binary Tree +#include "leetcode.h" + +/* + * given 'root' of binary tree, return the maximum width of the + * given tree. the maximum width of a tree is the maximum width + * among all levels. the width of one level is defined as the + * length between the end-nodes (the leftmost and rightmost non + * null nodes), where the null nodes between the end-nodes that + * would be present in a complete binary tree extending down to + * that level are also counted into the length calculation. + */ + +class Solution { +public: + int widthOfBinaryTree(TreeNode *root) { + if (root == NULL) + return 0; + int max_width = 1; + queue<pair<TreeNode *, int>> qp; + qp.push({root, 0}); + while (!qp.empty()) { + int level_size = qp.size(); + int start_idx = qp.front().second; + int end_idx = qp.back().second; + max_width = max(max_width, end_idx - start_idx + 1); + for (int i = 0; i < level_size; ++i) { + auto node_idx_pair = qp.front(); + TreeNode *node = node_idx_pair.first; + int node_idx = node_idx_pair.second - start_idx; + qp.pop(); + if (node->left != nullptr) + qp.push({node->left, 2LL * node_idx + 1}); + if (node->right != nullptr) + qp.push({node->right, 2LL * node_idx + 2}); + } + } + return max_width; + } +}; |