Merge pull request #644 from fartem/2520_Count_the_Digits_That_Divide_a_Number

2024-06-12 v. 5.8.7: added "2520. Count the Digits That Divide a Number"

Author: fartem

README.md

@@ -447,3 +447,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 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)                               |
 | 2511. Maximum Enemy Forts That Can Be Captured                     | [Link](https://leetcode.com/problems/maximum-enemy-forts-that-can-be-captured/)                     | [Link](./lib/easy/2511_maximum_enemy_forts_that_can_be_captured.rb)                     |
 | 2515. Shortest Distance to Target String in a Circular Array       | [Link](https://leetcode.com/problems/shortest-distance-to-target-string-in-a-circular-array/)       | [Link](./lib/easy/2515_shortest_distance_to_target_string_in_a_circular_array.rb)       |
+| 2520. Count the Digits That Divide a Number                        | [Link](https://leetcode.com/problems/count-the-digits-that-divide-a-number/)                        | [Link](./lib/easy/2520_count_the_digits_that_divide_a_number.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 = '5.8.6'
+  s.version = '5.8.7'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/2520_count_the_digits_that_divide_a_number.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/count-the-digits-that-divide-a-number/
+# @param {Integer} num
+# @return {Integer}
+def count_digits(num)
+  original = num
+  result = 0
+  while num.positive?
+    digit = num % 10
+    result += 1 if (original % digit).zero?
+    num /= 10
+  end
+
+  result
+end

test/easy/test_2520_count_the_digits_that_divide_a_number.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/2520_count_the_digits_that_divide_a_number'
+require 'minitest/autorun'
+
+class CountTheDigitsThatDivideANumberTest < ::Minitest::Test
+  def test_default
+    assert_equal(1, count_digits(7))
+    assert_equal(2, count_digits(121))
+    assert_equal(4, count_digits(1248))
+  end
+end