2024-04-09 v. 5.4.2: added "2264. Largest 3-Same-Digit Number in String"

README.md

@@ -402,3 +402,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2248. Intersection of Multiple Arrays                              | [Link](https://leetcode.com/problems/intersection-of-multiple-arrays/)                              | [Link](./lib/easy/2248_intersection_of_multiple_arrays.rb)                              |
 | 2255. Count Prefixes of a Given String                             | [Link](https://leetcode.com/problems/count-prefixes-of-a-given-string/)                             | [Link](./lib/easy/2255_count_prefixes_of_a_given_string.rb)                             |
 | 2259. Remove Digit From Number to Maximize Result                  | [Link](https://leetcode.com/problems/remove-digit-from-number-to-maximize-result/)                  | [Link](./lib/easy/2259_remove_digit_from_number_to_maximize_result.rb)                  |
+| 2264. Largest 3-Same-Digit Number in String                        | [Link](https://leetcode.com/problems/largest-3-same-digit-number-in-string/)                        | [Link](./lib/easy/2264_largest_3_same_digit_number_in_string.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 = '5.4.1'
+  s.version = '5.4.2'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/2264_largest_3_same_digit_number_in_string.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/largest-3-same-digit-number-in-string/
+# @param {String} num
+# @return {String}
+def largest_good_integer(num)
+  result = ''
+  prev = num[0]
+  candidate = [prev]
+  p = 1
+  (1...num.length).each do |i|
+    curr = num[i]
+
+    p = 0 unless prev == curr
+    candidate[p] = curr
+    p += 1
+
+    prev = curr
+
+    next unless p == 3
+
+    result = [result, candidate.join].max
+    p = 0
+  end
+
+  result
+end

test/easy/test_2264_largest_3_same_digit_number_in_string.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/2264_largest_3_same_digit_number_in_string'
+require 'minitest/autorun'
+
+class Largest3SameDigitNumberInStringTest < ::Minitest::Test
+  def test_default
+    assert_equal('777', largest_good_integer('6777133339'))
+    assert_equal('000', largest_good_integer('2300019'))
+    assert_equal('', largest_good_integer('42352338'))
+  end
+end