2024-12-12 v. 7.3.0: added "606. Construct String from Binary Tree"

README.md

@@ -127,7 +127,6 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 590. N-ary Tree Postorder Traversal                                | [Link](https://leetcode.com/problems/n-ary-tree-postorder-traversal/)                               | [Link](./lib/easy/590_n_ary_tree_postorder_traversal.rb)                                | [Link](./test/easy/test_590_n_ary_tree_postorder_traversal.rb)                                |
 | 594. Longest Harmonious Subsequence                                | [Link](https://leetcode.com/problems/longest-harmonious-subsequence/)                               | [Link](./lib/easy/594_longest_harmonious_subsequence.rb)                                | [Link](./test/easy/test_594_longest_harmonious_subsequence.rb)                                |
 | 599. Minimum Index Sum of Two Lists                                | [Link](https://leetcode.com/problems/minimum-index-sum-of-two-lists/)                               | [Link](./lib/easy/599_minimum_index_sum_of_two_lists.rb)                                | [Link](./test/easy/test_599_minimum_index_sum_of_two_lists.rb)                                |
-| 606. Construct String from Binary Tree                             | [Link](https://leetcode.com/problems/construct-string-from-binary-tree/)                            | [Link](./lib/easy/606_construct_string_from_binary_tree.rb)                             | [Link](./test/easy/test_606_construct_string_from_binary_tree.rb)                             |
 | 617. Merge Two Binary Trees                                        | [Link](https://leetcode.com/problems/merge-two-binary-trees/)                                       | [Link](./lib/easy/617_merge_two_binary_trees.rb)                                        | [Link](./test/easy/test_617_merge_two_binary_trees.rb)                                        |
 | 628. Maximum Product of Three Numbers                              | [Link](https://leetcode.com/problems/maximum-product-of-three-numbers/)                             | [Link](./lib/easy/628_maximum_product_of_three_numbers.rb)                              | [Link](./test/easy/test_628_maximum_product_of_three_numbers.rb)                              |
 | 637. Average of Levels in Binary Tree                              | [Link](https://leetcode.com/problems/average-of-levels-in-binary-tree/)                             | [Link](./lib/easy/637_average_of_levels_in_binary_tree.rb)                              | [Link](./test/easy/test_637_average_of_levels_in_binary_tree.rb)                              |
@@ -595,3 +594,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 556. Next Greater Element III                                   | [Link](https://leetcode.com/problems/next-greater-element-iii/)                                   | [Link](./lib/medium/556_next_greater_element_iii.rb)                                   | [Link](./test/medium/test_556_next_greater_element_iii.rb)                                   |
 | 560. Subarray Sum Equals K                                      | [Link](https://leetcode.com/problems/subarray-sum-equals-k/)                                      | [Link](./lib/medium/560_subarray_sum_equals_k.rb)                                      | [Link](./test/medium/test_560_subarray_sum_equals_k.rb)                                      |
 | 581. Shortest Unsorted Continuous Subarray                      | [Link](https://leetcode.com/problems/shortest-unsorted-continuous-subarray/)                      | [Link](./lib/medium/581_shortest_unsorted_continuous_subarray.rb)                      | [Link](./test/medium/test_581_shortest_unsorted_continuous_subarray.rb)                      |
+| 606. Construct String from Binary Tree                          | [Link](https://leetcode.com/problems/construct-string-from-binary-tree/)                          | [Link](./lib/medium/606_construct_string_from_binary_tree.rb)                          | [Link](./test/medium/test_606_construct_string_from_binary_tree.rb)                          |

leetcode-ruby.gemspec

@@ -5,7 +5,7 @@ require 'English'
 ::Gem::Specification.new do |s|
   s.required_ruby_version = '>= 3.0'
   s.name = 'leetcode-ruby'
-  s.version = '7.2.9'
+  s.version = '7.3.0'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/easy/606_construct_string_from_binary_tree.rb → lib/medium/606_construct_string_from_binary_tree.rb

@@ -10,6 +10,8 @@ def tree2str(root)
   result.join
 end
 
+private
+
 # @param {TreeNode} node
 # @param {String[]} str
 def tree_to_str(node, str)

test/easy/test_606_construct_string_from_binary_tree.rb → test/medium/test_606_construct_string_from_binary_tree.rb

@@ -2,7 +2,7 @@
 
 require_relative '../test_helper'
 require_relative '../../lib/common/binary_tree'
-require_relative '../../lib/easy/606_construct_string_from_binary_tree'
+require_relative '../../lib/medium/606_construct_string_from_binary_tree'
 require 'minitest/autorun'
 
 class ConstructStringFromBinaryTreeTest < ::Minitest::Test