2025-02-07 v. 8.4.6: added "1329. Sort the Matrix Diagonally"

Author: fartem

README.md

@@ -678,6 +678,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 1310. XOR Queries of a Subarray                                  | [Link](https://leetcode.com/problems/xor-queries-of-a-subarray/)                                   | [Link](./lib/medium/1310_xor_queries_of_a_subarray.rb)                                  | [Link](./test/medium/test_1310_xor_queries_of_a_subarray.rb)                                  |
 | 1315. Sum of Nodes with Even-Valued Grandparent                  | [Link](https://leetcode.com/problems/sum-of-nodes-with-even-valued-grandparent/)                   | [Link](./lib/medium/1315_sum_of_nodes_with_even_valued_grandparent.rb)                  | [Link](./test/medium/test_1315_sum_of_nodes_with_even_valued_grandparent.rb)                  |
 | 1325. Delete Leaves With a Given Value                           | [Link](https://leetcode.com/problems/delete-leaves-with-a-given-value/)                            | [Link](./lib/medium/1325_delete_leaves_with_a_given_value.rb)                           | [Link](./test/medium/test_1325_delete_leaves_with_a_given_value.rb)                           |
+| 1329. Sort the Matrix Diagonally                                 | [Link](https://leetcode.com/problems/sort-the-matrix-diagonally/)                                  | [Link](./lib/medium/1329_sort_the_matrix_diagonally.rb)                                 | [Link](./test/medium/test_1329_sort_the_matrix_diagonally.rb)                                 |
 | 1400. Construct K Palindrome Strings                             | [Link](https://leetcode.com/problems/construct-k-palindrome-strings/)                              | [Link](./lib/medium/1400_construct_k_palindrome_strings.rb)                             | [Link](./test/medium/test_1400_construct_k_palindrome_strings.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)                                |

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 = '8.4.5'
+  s.version = '8.4.6'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'

lib/medium/1329_sort_the_matrix_diagonally.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/sort-the-matrix-diagonally/
+# @param {Integer[][]} mat
+# @return {Integer[][]}
+def diagonal_sort(mat)
+  rows = mat.size
+  columns = mat[0].size
+
+  (0...rows).each do |row|
+    i = row
+    j = 0
+    diagonals = []
+
+    while i < rows && j < columns
+      diagonals << mat[i][j]
+
+      i += 1
+      j += 1
+    end
+
+    diagonals.sort!
+
+    i = row
+    j = 0
+    k = 0
+
+    while i < rows && j < columns
+      mat[i][j] = diagonals[k]
+
+      i += 1
+      j += 1
+      k += 1
+    end
+  end
+
+  (0...columns).each do |column|
+    i = 0
+    j = column
+    diagonals = []
+
+    while i < rows && j < columns
+      diagonals << mat[i][j]
+
+      i += 1
+      j += 1
+    end
+
+    diagonals.sort!
+
+    i = 0
+    j = column
+    k = 0
+
+    while i < rows && j < columns
+      mat[i][j] = diagonals[k]
+
+      i += 1
+      j += 1
+      k += 1
+    end
+  end
+
+  mat
+end

test/medium/test_1329_sort_the_matrix_diagonally.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/1329_sort_the_matrix_diagonally'
+require 'minitest/autorun'
+
+class SortTheMatrixDiagonallyTest < ::Minitest::Test
+  def test_diagonal_sort_small_matrix
+    assert_equal(
+      [
+        [1, 1, 1, 1],
+        [1, 2, 2, 2],
+        [1, 2, 3, 3]
+      ],
+      diagonal_sort(
+        [
+          [3, 3, 1, 1],
+          [2, 2, 1, 2],
+          [1, 1, 1, 2]
+        ]
+      )
+    )
+  end
+
+  def test_diagonal_sort_large_matrix
+    assert_equal(
+      [
+        [5, 17, 4, 1, 52, 7],
+        [11, 11, 25, 45, 8, 69],
+        [14, 23, 25, 44, 58, 15],
+        [22, 27, 31, 36, 50, 66],
+        [84, 28, 75, 33, 55, 68]
+      ],
+      diagonal_sort(
+        [
+          [11, 25, 66, 1, 69, 7],
+          [23, 55, 17, 45, 15, 52],
+          [75, 31, 36, 44, 58, 8],
+          [22, 27, 33, 25, 68, 4],
+          [84, 28, 14, 11, 5, 50]
+        ]
+      )
+    )
+  end
+end