From ce3ca0a62088a79f5f6c544608e8743b025ada61 Mon Sep 17 00:00:00 2001
From: fartem <jaman.smlnsk@gmail.com>
Date: Thu, 17 Apr 2025 12:44:32 +0300
Subject: [PATCH] 2025-04-17 v. 9.2.8: added "3083. Existence of a Substring in
 a String and Its Reverse"

---
 README.md                                     |  1 +
 leetcode-ruby.gemspec                         |  2 +-
 ...a_substring_in_a_string_and_its_reverse.rb | 17 ++++++++++
 ...a_substring_in_a_string_and_its_reverse.rb | 31 +++++++++++++++++++
 4 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse.rb
 create mode 100644 test/easy/test_3083_existence_of_a_substring_in_a_string_and_its_reverse.rb

diff --git a/README.md b/README.md
index 9239f3ac..2812e622 100644
--- a/README.md
+++ b/README.md
@@ -455,6 +455,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 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)                              |
 | 2652. Sum Multiples                                                | [Link](https://leetcode.com/problems/sum-multiples/)                                                | [Link](./lib/easy/2652_sum_multiples.rb)                                                | [Link](./test/easy/test_2652_sum_multiples.rb)                                                |
 | 2974. Minimum Number Game                                          | [Link](https://leetcode.com/problems/minimum-number-game/)                                          | [Link](./lib/easy/2974_minimum_number_game.rb)                                          | [Link](./test/easy/test_2974_minimum_number_game.rb)                                          |
+| 3083. Existence of a Substring in a String and Its Reverse         | [Link](https://leetcode.com/problems/existence-of-a-substring-in-a-string-and-its-reverse/)         | [Link](./lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse.rb)         | [Link](./test/easy/test_3083_existence_of_a_substring_in_a_string_and_its_reverse.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)                                            |
 | 3136. Valid Word                                                   | [Link](https://leetcode.com/problems/valid-word/)                                                   | [Link](./lib/easy/3136_valid_word.rb)                                                   | [Link](./test/easy/test_3136_valid_word.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)                                              |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 962ff221..807ec091 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 = '9.2.7'
+  s.version = '9.2.8'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse.rb b/lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse.rb
new file mode 100644
index 00000000..716b3ede
--- /dev/null
+++ b/lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/existence-of-a-substring-in-a-string-and-its-reverse/
+# @param {String} s
+# @return {Boolean}
+def is_substring_present(s)
+  return false if s.size < 2
+
+  rev = s.reverse
+  subs = []
+
+  (0..s.length - 2).each do |i|
+    subs << s[i, 2]
+  end
+
+  subs.any? { |sub| rev.include?(sub) }
+end
diff --git a/test/easy/test_3083_existence_of_a_substring_in_a_string_and_its_reverse.rb b/test/easy/test_3083_existence_of_a_substring_in_a_string_and_its_reverse.rb
new file mode 100644
index 00000000..8b853003
--- /dev/null
+++ b/test/easy/test_3083_existence_of_a_substring_in_a_string_and_its_reverse.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse'
+require 'minitest/autorun'
+
+class ExistenceOfASubstringInAStringAndItsReverseTest < ::Minitest::Test
+  def test_default_one
+    assert(
+      is_substring_present(
+        'leetcode'
+      )
+    )
+  end
+
+  def test_default_two
+    assert(
+      is_substring_present(
+        'abcba'
+      )
+    )
+  end
+
+  def test_default_three
+    assert(
+      !is_substring_present(
+        'abcd'
+      )
+    )
+  end
+end