2024-07-05 v. 6.0.7: added "29. Divide Two Integers"

Author: fartem

README.md

@@ -472,3 +472,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 19. Remove Nth Node From End of List              | [Link](https://leetcode.com/problems/remove-nth-node-from-end-of-list/)               | [Link](./lib/medium/19_remove_nth_node_from_end_of_list.rb)              |
 | 22. Generate Parentheses                          | [Link](https://leetcode.com/problems/generate-parentheses/)                           | [Link](./lib/medium/22_generate_parentheses.rb)                          |
 | 24. Swap Nodes in Pairs                           | [Link](https://leetcode.com/problems/swap-nodes-in-pairs/)                            | [Link](./lib/medium/24_swap_nodes_in_pairs.rb)                           |
+| 29. Divide Two Integers                           | [Link](https://leetcode.com/problems/divide-two-integers/)                            | [Link](./lib/medium/29_divide_two_integers.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 = '6.0.6'
+  s.version = '6.0.7'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/medium/29_divide_two_integers.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/divide-two-integers/
+# @param {Integer} dividend
+# @param {Integer} divisor
+# @return {Integer}
+def divide(dividend, divisor)
+  return 2**31 - 1 if dividend == -2**31 && divisor == -1
+
+  neg = (dividend.negative? || divisor.negative?) && (dividend.positive? || divisor.positive?)
+  dividend = dividend.abs
+  divisor = divisor.abs
+  quotient = 0
+
+  while dividend - divisor >= 0
+    sub_quotient = 0
+    sub_quotient += 1 while dividend - (divisor << sub_quotient << 1) >= 0
+    quotient += 1 << sub_quotient
+    dividend -= divisor << sub_quotient
+  end
+
+  neg ? -quotient : quotient
+end

test/medium/test_29_divide_two_integers.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/29_divide_two_integers'
+require 'minitest/autorun'
+
+class DivideTwoIntegersTest < ::Minitest::Test
+  def test_default
+    assert_equal(3, divide(10, 3))
+    assert_equal(-2, divide(7, -3))
+  end
+end