diff --git a/README.md b/README.md
index 048654a1..c8626e6c 100644
--- a/README.md
+++ b/README.md
@@ -543,3 +543,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 236. Lowest Common Ancestor of a Binary Tree                    | [Link](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/)                    | [Link](./lib/medium/236_lowest_common_ancestor_of_a_binary_tree.rb)                    | [Link](./test/medium/test_236_lowest_common_ancestor_of_a_binary_tree.rb)                    |
 | 237. Delete Node in a Linked List                               | [Link](https://leetcode.com/problems/delete-node-in-a-linked-list/)                               | [Link](./lib/medium/237_delete_node_in_a_linked_list.rb)                               | [Link](./test/medium/test_237_delete_node_in_a_linked_list.rb)                               |
 | 238. Product of Array Except Self                               | [Link](https://leetcode.com/problems/product-of-array-except-self/)                               | [Link](./lib/medium/238_product_of_array_except_self.rb)                               | [Link](./test/medium/test_238_product_of_array_except_self.rb)                               |
+| 240. Search a 2D Matrix II                                      | [Link](https://leetcode.com/problems/search-a-2d-matrix-ii/)                                      | [Link](./lib/medium/240_search_a_2d_matrix_ii.rb)                                      | [Link](./test/medium/test_240_search_a_2d_matrix_ii.rb)                                      |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index e5b70720..c08595e8 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 = '6.7.7'
+  s.version = '6.7.8'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/medium/240_search_a_2d_matrix_ii.rb b/lib/medium/240_search_a_2d_matrix_ii.rb
new file mode 100644
index 00000000..bddea8db
--- /dev/null
+++ b/lib/medium/240_search_a_2d_matrix_ii.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/search-a-2d-matrix-ii/
+# @param {Integer[][]} matrix
+# @param {Integer} target
+# @return {Boolean}
+def search_matrix240(matrix, target)
+  matrix.each do |matr|
+    l = 0
+    r = matrix.first.length - 1
+
+    while l <= r
+      m = (l + r) / 2
+      curr = matr[m]
+
+      return true if curr == target
+
+      if curr > target
+        r = m - 1
+      else
+        l = m + 1
+      end
+    end
+  end
+
+  false
+end
diff --git a/test/medium/test_240_search_a_2d_matrix_ii.rb b/test/medium/test_240_search_a_2d_matrix_ii.rb
new file mode 100644
index 00000000..7cf39606
--- /dev/null
+++ b/test/medium/test_240_search_a_2d_matrix_ii.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/240_search_a_2d_matrix_ii'
+require 'minitest/autorun'
+
+class SearchA2DMatrixIITest < ::Minitest::Test
+  def test_default_one
+    assert(
+      search_matrix240(
+        [
+          [1, 4, 7, 11, 15],
+          [2, 5, 8, 12, 19],
+          [3, 6, 9, 16, 22],
+          [10, 13, 14, 17, 24],
+          [18, 21, 23, 26, 30]
+        ],
+        5
+      )
+    )
+  end
+
+  def test_default_two
+    assert(
+      !search_matrix240(
+        [
+          [1, 4, 7, 11, 15],
+          [2, 5, 8, 12, 19],
+          [3, 6, 9, 16, 22],
+          [10, 13, 14, 17, 24],
+          [18, 21, 23, 26, 30]
+        ],
+        20
+      )
+    )
+  end
+end