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Commit 07dc1ae

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2025年04月17日 v. 9.2.8: added "3083. Existence of a Substring in a String and Its Reverse"
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‎README.md‎

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@@ -455,6 +455,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
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| 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) |
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| 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) |
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| 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) |
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| 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) |
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| 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) |
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| 3131. Find the Integer Added to Array I | [Link](https://leetcode.com/problems/find-the-integer-added-to-array-i/) | [Link](./lib/easy/3131_find_the_integer_added_to_array_i.rb) | [Link](./test/easy/test_3131_find_the_integer_added_to_array_i.rb) |
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| 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) |
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# frozen_string_literal: true
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# https://leetcode.com/problems/existence-of-a-substring-in-a-string-and-its-reverse/
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# @param {String} s
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# @return {Boolean}
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def is_substring_present(s)
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return false if s.size < 2
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rev = s.reverse
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subs = []
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(0..s.length - 2).each do |i|
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subs << s[i, 2]
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end
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subs.any? { |sub| rev.include?(sub) }
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end
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# frozen_string_literal: true
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require_relative '../test_helper'
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require_relative '../../lib/easy/3083_existence_of_a_substring_in_a_string_and_its_reverse'
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require 'minitest/autorun'
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class ExistenceOfASubstringInAStringAndItsReverseTest < ::Minitest::Test
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def test_default_one
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assert(
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is_substring_present(
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'leetcode'
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)
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)
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end
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def test_default_two
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assert(
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is_substring_present(
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'abcba'
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)
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)
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end
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def test_default_three
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assert(
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!is_substring_present(
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'abcd'
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)
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)
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end
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end

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