From c7c945d758292a20467e7de8a027e11bf62fa0ef Mon Sep 17 00:00:00 2001 From: fartem Date: Fri, 28 Feb 2025 07:46:17 +0300 Subject: [PATCH] 2025-02-28 v. 8.7.6: added "1670. Design Front Middle Back Queue" --- README.md | 1 + leetcode-ruby.gemspec | 2 +- .../1670_design_front_middle_back_queue.rb | 48 +++++++++++++++++++ ...est_1670_design_front_middle_back_queue.rb | 21 ++++++++ 4 files changed, 71 insertions(+), 1 deletion(-) create mode 100644 lib/medium/1670_design_front_middle_back_queue.rb create mode 100644 test/medium/test_1670_design_front_middle_back_queue.rb diff --git a/README.md b/README.md index ea8c166c..28457b7b 100644 --- a/README.md +++ b/README.md @@ -709,6 +709,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/). | 1630. Arithmetic Subarrays | [Link](https://leetcode.com/problems/arithmetic-subarrays/) | [Link](./lib/medium/1630_arithmetic_subarrays.rb) | [Link](./test/medium/test_1630_arithmetic_subarrays.rb) | | 1641. Count Sorted Vowel Strings | [Link](https://leetcode.com/problems/count-sorted-vowel-strings/) | [Link](./lib/medium/1641_count_sorted_vowel_strings.rb) | [Link](./test/medium/test_1641_count_sorted_vowel_strings.rb) | | 1669. Merge In Between Linked Lists | [Link](https://leetcode.com/problems/merge-in-between-linked-lists/) | [Link](./lib/medium/1669_merge_in_between_linked_lists.rb) | [Link](./test/medium/test_1669_merge_in_between_linked_lists.rb) | +| 1670. Design Front Middle Back Queue | [Link](https://leetcode.com/problems/design-front-middle-back-queue/) | [Link](./lib/medium/1670_design_front_middle_back_queue.rb) | [Link](./test/medium/test_1670_design_front_middle_back_queue.rb) | | 2116. Check if a Parentheses String Can Be Valid | [Link](https://leetcode.com/problems/check-if-a-parentheses-string-can-be-valid/) | [Link](./lib/medium/2116_check_if_a_parentheses_string_can_be_valid.rb) | [Link](./test/medium/test_2116_check_if_a_parentheses_string_can_be_valid.rb) | | 2425. Bitwise XOR of All Pairings | [Link](https://leetcode.com/problems/bitwise-xor-of-all-pairings/) | [Link](./lib/medium/2425_bitwise_xor_of_all_pairings.rb) | [Link](./test/medium/test_2425_bitwise_xor_of_all_pairings.rb) | | 2429. Minimize XOR | [Link](https://leetcode.com/problems/minimize-xor/) | [Link](./lib/medium/2429_minimize_xor.rb) | [Link](./test/medium/test_2429_minimize_xor.rb) | diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec index fc342d7f..0bb1c4dc 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 = '8.7.5' + s.version = '8.7.6' s.license = 'MIT' s.files = ::Dir['lib/**/*.rb'] + %w[README.md] s.executable = 'leetcode-ruby' diff --git a/lib/medium/1670_design_front_middle_back_queue.rb b/lib/medium/1670_design_front_middle_back_queue.rb new file mode 100644 index 00000000..38cbd86e --- /dev/null +++ b/lib/medium/1670_design_front_middle_back_queue.rb @@ -0,0 +1,48 @@ +# frozen_string_literal: true + +# https://leetcode.com/problems/design-front-middle-back-queue/ +class FrontMiddleBackQueue + # Init + def initialize + @list = [] + end + + # @param {Integer} val + # @return {Void} + def push_front(val) + @list.unshift(val) + end + + # @param {Integer} val + # @return {Void} + def push_middle(val) + @list.insert(@list.size / 2, val) + end + + # @param {Integer} val + # @return {Void} + def push_back(val) + @list << val + end + + # @return {Integer} + def pop_front + @list.empty? ? -1 : @list.shift + end + + # @return {Integer} + def pop_middle + size = @list.size + + return -1 if size.zero? + + index = size.even? ? size / 2 - 1 : size / 2 + + @list.delete_at(index) + end + + # @return {Integer} + def pop_back + @list.empty? ? -1 : @list.pop + end +end diff --git a/test/medium/test_1670_design_front_middle_back_queue.rb b/test/medium/test_1670_design_front_middle_back_queue.rb new file mode 100644 index 00000000..a4a3096b --- /dev/null +++ b/test/medium/test_1670_design_front_middle_back_queue.rb @@ -0,0 +1,21 @@ +# frozen_string_literal: true + +require_relative '../test_helper' +require_relative '../../lib/medium/1670_design_front_middle_back_queue' +require 'minitest/autorun' + +class DesignFrontMiddleBackQueueTest < ::Minitest::Test + def test_default_one + front_middle_back_queue = ::FrontMiddleBackQueue.new + front_middle_back_queue.push_front(1) + front_middle_back_queue.push_back(2) + front_middle_back_queue.push_middle(3) + front_middle_back_queue.push_middle(4) + + assert_equal(1, front_middle_back_queue.pop_front) + assert_equal(3, front_middle_back_queue.pop_middle) + assert_equal(4, front_middle_back_queue.pop_middle) + assert_equal(2, front_middle_back_queue.pop_back) + assert_equal(-1, front_middle_back_queue.pop_front) + end +end