2025-04-03 v. 9.1.8: added "2326. Spiral Matrix IV"

Author: fartem

README.md

@@ -752,6 +752,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2265. Count Nodes Equal to Average of Subtree                                       | [Link](https://leetcode.com/problems/count-nodes-equal-to-average-of-subtree/)                                       | [Link](./lib/medium/2265_count_nodes_equal_to_average_of_subtree.rb)                                       | [Link](./test/medium/test_2265_count_nodes_equal_to_average_of_subtree.rb)                                       |
 | 2266. Count Number of Texts                                                         | [Link](https://leetcode.com/problems/count-number-of-texts/)                                                         | [Link](./lib/medium/2266_count_number_of_texts.rb)                                                         | [Link](./test/medium/test_2266_count_number_of_texts.rb)                                                         |
 | 2295. Replace Elements in an Array                                                  | [Link](https://leetcode.com/problems/replace-elements-in-an-array/)                                                  | [Link](./lib/medium/2295_replace_elements_in_an_array.rb)                                                  | [Link](./test/medium/test_2295_replace_elements_in_an_array.rb)                                                  |
+| 2326. Spiral Matrix IV                                                              | [Link](https://leetcode.com/problems/spiral-matrix-iv/)                                                              | [Link](./lib/medium/2326_spiral_matrix_iv.rb)                                                              | [Link](./test/medium/test_2326_spiral_matrix_iv.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)                                    |

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 = '9.1.7'
+  s.version = '9.1.8'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/2326_spiral_matrix_iv.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/spiral-matrix-iv/
+# @param {Integer} m
+# @param {Integer} n
+# @param {ListNode} head
+# @return {Integer[][]}
+def spiral_matrix(m, n, head)
+  matrix = ::Array.new(m) { ::Array.new(n, -1) }
+
+  return matrix unless head
+
+  directions = [
+    [0, 1],
+    [1, 0],
+    [0, -1],
+    [-1, 0]
+  ]
+  current_dir = 0
+  row = 0
+  col = 0
+  current = head
+
+  while current
+    matrix[row][col] = current.val
+    current = current.next
+
+    next_row = row + directions[current_dir][0]
+    next_col = col + directions[current_dir][1]
+
+    if next_row.negative? || next_row >= m || next_col.negative? || next_col >= n || matrix[next_row][next_col] != -1
+      current_dir = (current_dir + 1) % 4
+      next_row = row + directions[current_dir][0]
+      next_col = col + directions[current_dir][1]
+    end
+
+    row = next_row
+    col = next_col
+  end
+
+  matrix
+end

test/medium/test_2326_spiral_matrix_iv.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/common/linked_list'
+require_relative '../../lib/medium/2326_spiral_matrix_iv'
+require 'minitest/autorun'
+
+class SpiralMatrixIVTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      [
+        [3, 0, 2, 6, 8],
+        [5, 0, -1, -1, 1],
+        [5, 2, 4, 9, 7]
+      ],
+      spiral_matrix(
+        3,
+        5,
+        ::ListNode.from_array(
+          [3, 0, 2, 6, 8, 1, 7, 9, 4, 2, 5, 5, 0]
+        )
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      [
+        [0, 1, 2, -1]
+      ],
+      spiral_matrix(
+        1,
+        4,
+        ::ListNode.from_array(
+          [0, 1, 2]
+        )
+      )
+    )
+  end
+end