From 153552a9aee842d80037b04e6cba629ae0e2d00a Mon Sep 17 00:00:00 2001
From: fartem <jaman.smlnsk@gmail.com>
Date: Fri, 7 Jun 2024 09:16:47 +0300
Subject: [PATCH] 2024-06-07 v. 5.8.4: added "2506. Count Pairs Of Similar
 Strings"

---
 README.md                                     |  1 +
 leetcode-ruby.gemspec                         |  2 +-
 .../2506_count_pairs_of_similar_strings.rb    | 25 +++++++++++++++++++
 ...est_2506_count_pairs_of_similar_strings.rb | 13 ++++++++++
 4 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 lib/easy/2506_count_pairs_of_similar_strings.rb
 create mode 100644 test/easy/test_2506_count_pairs_of_similar_strings.rb

diff --git a/README.md b/README.md
index 1baf5a8f..68a0f5b3 100644
--- a/README.md
+++ b/README.md
@@ -444,3 +444,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2490. Circular Sentence                                            | [Link](https://leetcode.com/problems/circular-sentence/)                                            | [Link](./lib/easy/2490_circular_sentence.rb)                                            |
 | 2496. Maximum Value of a String in an Array                        | [Link](https://leetcode.com/problems/maximum-value-of-a-string-in-an-array/)                        | [Link](./lib/easy/2496_maximum_value_of_a_string_in_an_array.rb)                        |
 | 2500. Delete Greatest Value in Each Row                            | [Link](https://leetcode.com/problems/delete-greatest-value-in-each-row/)                            | [Link](./lib/easy/2500_delete_greatest_value_in_each_row.rb)                            |
+| 2506. Count Pairs Of Similar Strings                               | [Link](https://leetcode.com/problems/count-pairs-of-similar-strings/)                               | [Link](./lib/easy/2506_count_pairs_of_similar_strings.rb)                               |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 2c7ac1a4..33d959c5 100644
--- a/leetcode-ruby.gemspec
+++ b/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 = '5.8.3'
+  s.version = '5.8.4'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'
diff --git a/lib/easy/2506_count_pairs_of_similar_strings.rb b/lib/easy/2506_count_pairs_of_similar_strings.rb
new file mode 100644
index 00000000..48b26535
--- /dev/null
+++ b/lib/easy/2506_count_pairs_of_similar_strings.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'set'
+
+# https://leetcode.com/problems/count-pairs-of-similar-strings/
+# @param {String[]} words
+# @return {Integer}
+def similar_pairs(words)
+  map = {}
+  result = 0
+
+  (0...words.length).each do |i|
+    word = words[i]
+    map[word] = word.chars.to_set unless map.key?(word)
+
+    ((i + 1)...words.length).each do |j|
+      compare = words[j]
+      map[compare] = compare.chars.to_set unless map.key?(compare)
+
+      result += 1 if map[word] == map[compare]
+    end
+  end
+
+  result
+end
diff --git a/test/easy/test_2506_count_pairs_of_similar_strings.rb b/test/easy/test_2506_count_pairs_of_similar_strings.rb
new file mode 100644
index 00000000..1bfea4ed
--- /dev/null
+++ b/test/easy/test_2506_count_pairs_of_similar_strings.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/2506_count_pairs_of_similar_strings'
+require 'minitest/autorun'
+
+class CountPairsOfSimilarStringsTest < ::Minitest::Test
+  def test_default
+    assert_equal(2, similar_pairs(%w[aba aabb abcd bac aabc]))
+    assert_equal(3, similar_pairs(%w[aabb ab ba]))
+    assert_equal(0, similar_pairs(%w[nba cba dba]))
+  end
+end