2024-12-10 v. 7.2.9: added "581. Shortest Unsorted Continuous Subarray"

README.md

@@ -594,3 +594,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 538. Convert BST to Greater Tree                                | [Link](https://leetcode.com/problems/convert-bst-to-greater-tree/)                                | [Link](./lib/medium/538_convert_bst_to_greater_tree.rb)                                | [Link](./test/medium/test_538_convert_bst_to_greater_tree.rb)                                |
 | 556. Next Greater Element III                                   | [Link](https://leetcode.com/problems/next-greater-element-iii/)                                   | [Link](./lib/medium/556_next_greater_element_iii.rb)                                   | [Link](./test/medium/test_556_next_greater_element_iii.rb)                                   |
 | 560. Subarray Sum Equals K                                      | [Link](https://leetcode.com/problems/subarray-sum-equals-k/)                                      | [Link](./lib/medium/560_subarray_sum_equals_k.rb)                                      | [Link](./test/medium/test_560_subarray_sum_equals_k.rb)                                      |
+| 581. Shortest Unsorted Continuous Subarray                      | [Link](https://leetcode.com/problems/shortest-unsorted-continuous-subarray/)                      | [Link](./lib/medium/581_shortest_unsorted_continuous_subarray.rb)                      | [Link](./test/medium/test_581_shortest_unsorted_continuous_subarray.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 = '7.2.8'
+  s.version = '7.2.9'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/581_shortest_unsorted_continuous_subarray.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/shortest-unsorted-continuous-subarray/
+# @param {Integer[]} nums
+# @return {Integer}
+def find_unsorted_subarray(nums)
+  sorted = nums.sort
+  start = nums.size
+  nd = 0
+  (0...nums.size).each do |i|
+    next if nums[i] == sorted[i]
+
+    start = [start, i].min
+    nd = [nd, i].max
+  end
+
+  nd - start >= 0 ? nd - start + 1 : 0
+end

test/medium/test_581_shortest_unsorted_continuous_subarray.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/581_shortest_unsorted_continuous_subarray'
+require 'minitest/autorun'
+
+class ShortestUnsortedContinuousSubarrayTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      5,
+      find_unsorted_subarray(
+        [2, 6, 4, 8, 10, 9, 15]
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      0,
+      find_unsorted_subarray(
+        [1, 2, 3, 4]
+      )
+    )
+  end
+
+  def test_default_three
+    assert_equal(
+      0,
+      find_unsorted_subarray(
+        [1]
+      )
+    )
+  end
+end