From d794c681c5ca2966f0776bd308344c19c496ee48 Mon Sep 17 00:00:00 2001
From: fartem <jaman.smlnsk@gmail.com>
Date: Fri, 21 Mar 2025 08:37:04 +0300
Subject: [PATCH] 2025-03-21 v. 9.0.6: added "2161. Partition Array According
 to Given Pivot"

---
 README.md                                     |  1 +
 leetcode-ruby.gemspec                         |  2 +-
 ...artition_array_according_to_given_pivot.rb | 33 +++++++++++++++++++
 ...artition_array_according_to_given_pivot.rb | 27 +++++++++++++++
 4 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 lib/medium/2161_partition_array_according_to_given_pivot.rb
 create mode 100644 test/medium/test_2161_partition_array_according_to_given_pivot.rb

diff --git a/README.md b/README.md
index f00fcfc4..285b47e2 100644
--- a/README.md
+++ b/README.md
@@ -741,6 +741,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2131. Longest Palindrome by Concatenating Two Letter Words                          | [Link](https://leetcode.com/problems/longest-palindrome-by-concatenating-two-letter-words/)                          | [Link](./lib/medium/2131_longest_palindrome_by_concatenating_two_letter_words.rb)                          | [Link](./test/medium/test_2131_longest_palindrome_by_concatenating_two_letter_words.rb)                          |
 | 2149. Rearrange Array Elements by Sign                                              | [Link](https://leetcode.com/problems/rearrange-array-elements-by-sign/)                                              | [Link](./lib/medium/2149_rearrange_array_elements_by_sign.rb)                                              | [Link](./test/medium/test_2149_rearrange_array_elements_by_sign.rb)                                              |
 | 2150. Find All Lonely Numbers in the Array                                          | [Link](https://leetcode.com/problems/find-all-lonely-numbers-in-the-array/)                                          | [Link](./lib/medium/2150_find_all_lonely_numbers_in_the_array.rb)                                          | [Link](./test/medium/test_2150_find_all_lonely_numbers_in_the_array.rb)                                          |
+| 2161. Partition Array According to Given Pivot                                      | [Link](https://leetcode.com/problems/partition-array-according-to-given-pivot/)                                      | [Link](./lib/medium/2161_partition_array_according_to_given_pivot.rb)                                      | [Link](./test/medium/test_2161_partition_array_according_to_given_pivot.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)                                                                  |
 | 2657. Find the Prefix Common Array of Two Arrays                                    | [Link](https://leetcode.com/problems/find-the-prefix-common-array-of-two-arrays/)                                    | [Link](./lib/medium/2657_find_the_prefix_common_array_of_two_arrays.rb)                                    | [Link](./test/medium/test_2657_find_the_prefix_common_array_of_two_arrays.rb)                                    |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 4588a46e..61677530 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 = '9.0.6'
+  s.version = '9.0.7'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/medium/2161_partition_array_according_to_given_pivot.rb b/lib/medium/2161_partition_array_according_to_given_pivot.rb
new file mode 100644
index 00000000..10a4eab4
--- /dev/null
+++ b/lib/medium/2161_partition_array_according_to_given_pivot.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/partition-array-according-to-given-pivot/
+# @param {Integer[]} nums
+# @param {Integer} pivot
+# @return {Integer[]}
+def pivot_array(nums, pivot)
+  result = ::Array.new(nums.size, 0)
+  left = 0
+  right = nums.size - 1
+  i = 0
+
+  while left < right && i < nums.size
+    if nums[i] < pivot
+      result[left] = nums[i]
+      left += 1
+    end
+
+    if nums[nums.size - i - 1] > pivot
+      result[right] = nums[nums.length - i - 1]
+      right -= 1
+    end
+
+    i += 1
+  end
+
+  while left <= right
+    result[left] = pivot
+    left += 1
+  end
+
+  result
+end
diff --git a/test/medium/test_2161_partition_array_according_to_given_pivot.rb b/test/medium/test_2161_partition_array_according_to_given_pivot.rb
new file mode 100644
index 00000000..105ab108
--- /dev/null
+++ b/test/medium/test_2161_partition_array_according_to_given_pivot.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/2161_partition_array_according_to_given_pivot'
+require 'minitest/autorun'
+
+class PartitionArrayAccordingToGivenPivotTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      [9, 5, 3, 10, 10, 12, 14],
+      pivot_array(
+        [9, 12, 5, 10, 14, 3, 10],
+        10
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      [-3, 2, 4, 3],
+      pivot_array(
+        [-3, 4, 3, 2],
+        2
+      )
+    )
+  end
+end