2025-02-18 v. 8.6.0: added "1442. Count Triplets That Can Form Two Arrays of Equal XOR"

Author: fartem

README.md

@@ -693,6 +693,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 1396. Design Underground System                                                     | [Link](https://leetcode.com/problems/design-underground-system/)                                                     | [Link](./lib/medium/1396_design_underground_system.rb)                                                     | [Link](./test/medium/test_1396_design_underground_system.rb)                                                     |
 | 1400. Construct K Palindrome Strings                                                | [Link](https://leetcode.com/problems/construct-k-palindrome-strings/)                                                | [Link](./lib/medium/1400_construct_k_palindrome_strings.rb)                                                | [Link](./test/medium/test_1400_construct_k_palindrome_strings.rb)                                                |
 | 1433. Check If a String Can Break Another String                                    | [Link](https://leetcode.com/problems/check-if-a-string-can-break-another-string/)                                    | [Link](./lib/medium/1433_check_if_a_string_can_break_another_string.rb)                                    | [Link](./test/medium/test_1433_check_if_a_string_can_break_another_string.rb)                                    |
+| 1442. Count Triplets That Can Form Two Arrays of Equal XOR                          | [Link](https://leetcode.com/problems/count-triplets-that-can-form-two-arrays-of-equal-xor/)                          | [Link](./lib/medium/1442_count_triplets_that_can_form_two_arrays_of_equal_xor.rb)                          | [Link](./test/medium/test_1442_count_triplets_that_can_form_two_arrays_of_equal_xor.rb)                          |
 | 2116. Check if a Parentheses String Can Be Valid                                    | [Link](https://leetcode.com/problems/check-if-a-parentheses-string-can-be-valid/)                                    | [Link](./lib/medium/2116_check_if_a_parentheses_string_can_be_valid.rb)                                    | [Link](./test/medium/test_2116_check_if_a_parentheses_string_can_be_valid.rb)                                    |
 | 2425. Bitwise XOR of All Pairings                                                   | [Link](https://leetcode.com/problems/bitwise-xor-of-all-pairings/)                                                   | [Link](./lib/medium/2425_bitwise_xor_of_all_pairings.rb)                                                   | [Link](./test/medium/test_2425_bitwise_xor_of_all_pairings.rb)                                                   |
 | 2429. Minimize XOR                                                                  | [Link](https://leetcode.com/problems/minimize-xor/)                                                                  | [Link](./lib/medium/2429_minimize_xor.rb)                                                                  | [Link](./test/medium/test_2429_minimize_xor.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 = '8.5.9'
+  s.version = '8.6.0'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/1442_count_triplets_that_can_form_two_arrays_of_equal_xor.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/count-triplets-that-can-form-two-arrays-of-equal-xor/
+# @param {Integer[]} arr
+# @return {Integer}
+def count_triplets(arr)
+  result = 0
+
+  (0...arr.size).each do |i|
+    xor = arr[i]
+
+    (i + 1...arr.size).each do |j|
+      xor ^= arr[j]
+
+      result += j - i if xor.zero?
+    end
+  end
+
+  result
+end

test/medium/test_1442_count_triplets_that_can_form_two_arrays_of_equal_xor.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/1442_count_triplets_that_can_form_two_arrays_of_equal_xor'
+require 'minitest/autorun'
+
+class CountTripletsThatCanFormTwoArraysOfEqualXORTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      4,
+      count_triplets(
+        [2, 3, 1, 6, 7]
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      10,
+      count_triplets(
+        [1, 1, 1, 1, 1]
+      )
+    )
+  end
+end