2025-04-11 v. 9.2.4: added "3151. Special Array I"

Author: fartem

README.md

@@ -454,6 +454,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2544. Alternating Digit Sum                                        | [Link](https://leetcode.com/problems/alternating-digit-sum/)                                        | [Link](./lib/easy/2544_alternating_digit_sum.rb)                                        | [Link](./test/easy/test_2544_alternating_digit_sum.rb)                                        |
 | 2549. Count Distinct Numbers on Board                              | [Link](https://leetcode.com/problems/count-distinct-numbers-on-board/)                              | [Link](./lib/easy/2549_count_distinct_numbers_on_board.rb)                              | [Link](./test/easy/test_2549_count_distinct_numbers_on_board.rb)                              |
 | 3110. Score of a String                                            | [Link](https://leetcode.com/problems/score-of-a-string/)                                            | [Link](./lib/easy/3110_score_of_a_string.rb)                                            | [Link](./test/easy/test_3110_score_of_a_string.rb)                                            |
+| 3151. Special Array I                                              | [Link](https://leetcode.com/problems/special-array-i/)                                              | [Link](./lib/easy/3151_special_array_i.rb)                                              | [Link](./test/easy/test_3151_special_array_i.rb)                                              |
 | 3498. Reverse Degree of a String                                   | [Link](https://leetcode.com/problems/reverse-degree-of-a-string/)                                   | [Link](./lib/easy/3498_reverse_degree_of_a_string.rb)                                   | [Link](./test/easy/test_3498_reverse_degree_of_a_string.rb)                                   |
 
 ### Medium

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 = '9.2.3'
+  s.version = '9.2.4'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/easy/3151_special_array_i.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/special-array-i/
+# @param {Integer[]} nums
+# @return {Boolean}
+def is_array_special(nums)
+  return true if nums.size == 1
+
+  (0...nums.size - 1).each do |i|
+    return false if nums[i].even? && nums[i + 1].even?
+
+    return false if nums[i].odd? && nums[i + 1].odd?
+  end
+
+  true
+end

test/easy/test_3151_special_array_i.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/3151_special_array_i'
+require 'minitest/autorun'
+
+class SpecialArrayITest < ::Minitest::Test
+  def test_default_one
+    assert(
+      is_array_special(
+        [1]
+      )
+    )
+  end
+
+  def test_default_two
+    assert(
+      is_array_special(
+        [2, 1, 4]
+      )
+    )
+  end
+
+  def test_default_three
+    assert(
+      !is_array_special(
+        [4, 3, 1, 6]
+      )
+    )
+  end
+end