Merge pull request #618 from fartem/2373_Largest_Local_Values_in_a_Matrix

2024-05-06 v. 5.6.1: added "2373. Largest Local Values in a Matrix"

Author: fartem

README.md

@@ -421,3 +421,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 2357. Make Array Zero by Subtracting Equal Amounts                 | [Link](https://leetcode.com/problems/make-array-zero-by-subtracting-equal-amounts/)                 | [Link](./lib/easy/2357_make_array_zero_by_subtracting_equal_amounts.rb)                 |
 | 2363. Merge Similar Items                                          | [Link](https://leetcode.com/problems/merge-similar-items/)                                          | [Link](./lib/easy/2363_merge_similar_items.rb)                                          |
 | 2367. Number of Arithmetic Triplets                                | [Link](https://leetcode.com/problems/number-of-arithmetic-triplets/)                                | [Link](./lib/easy/2367_number_of_arithmetic_triplets.rb)                                |
+| 2373. Largest Local Values in a Matrix                             | [Link](https://leetcode.com/problems/largest-local-values-in-a-matrix/)                             | [Link](./lib/easy/2373_largest_local_values_in_a_matrix.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 = '5.6.0'
+  s.version = '5.6.1'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/2373_largest_local_values_in_a_matrix.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/largest-local-values-in-a-matrix/
+# @param {Integer[][]} grid
+# @return {Integer[][]}
+def largest_local(grid)
+  n = grid.length - 2
+  result = ::Array.new(n) { ::Array.new(n, 0) }
+  (0...n).each do |i|
+    (0...n).each do |j|
+      result[i][j] = highest(grid, i, j)
+    end
+  end
+
+  result
+end
+
+# @param {Integer[][]} grid
+# @param {Integer} r
+# @param {Integer} c
+# @return {Integer}
+def highest(grid, r, c)
+  max = 0
+  (r...(r + 3)).each do |i|
+    (c...(c + 3)).each do |j|
+      max = [max, grid[i][j]].max
+    end
+  end
+
+  max
+end

test/easy/test_2373_largest_local_values_in_a_matrix.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/2373_largest_local_values_in_a_matrix'
+require 'minitest/autorun'
+
+class LargestLocalValuesInAMatrixTest < ::Minitest::Test
+  def test_default
+    assert_equal(
+      [[9, 9], [8, 6]],
+      largest_local(
+        [
+          [9, 9, 8, 1],
+          [5, 6, 2, 6],
+          [8, 2, 6, 4],
+          [6, 2, 2, 2]
+        ]
+      )
+    )
+    assert_equal(
+      [[2, 2, 2], [2, 2, 2], [2, 2, 2]],
+      largest_local(
+        [
+          [1, 1, 1, 1, 1],
+          [1, 1, 1, 1, 1],
+          [1, 1, 2, 1, 1],
+          [1, 1, 1, 1, 1],
+          [1, 1, 1, 1, 1]
+        ]
+      )
+    )
+  end
+end