diff --git a/README.md b/README.md
index 2bd8f9d7..305c8595 100644
--- a/README.md
+++ b/README.md
@@ -582,3 +582,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 456. 132 Pattern                                                | [Link](https://leetcode.com/problems/132-pattern/)                                                | [Link](./lib/medium/456_132_pattern.rb)                                                | [Link](./test/medium/test_456_132_pattern.rb)                                                |
 | 462. Minimum Moves to Equal Array Elements II                   | [Link](https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/)                   | [Link](./lib/medium/462_minimum_moves_to_equal_array_elements_ii.rb)                   | [Link](./test/medium/test_462_minimum_moves_to_equal_array_elements_ii.rb)                   |
 | 468. Validate IP Address                                        | [Link](https://leetcode.com/problems/validate-ip-address/)                                        | [Link](./lib/medium/468_validate_ip_address.rb)                                        | [Link](./test/medium/test_468_validate_ip_address.rb)                                        |
+| 474. Ones and Zeroes                                            | [Link](https://leetcode.com/problems/ones-and-zeroes/)                                            | [Link](./lib/medium/474_ones_and_zeroes.rb)                                            | [Link](./test/medium/test_474_ones_and_zeroes.rb)                                            |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index b33f633c..ea9cfc32 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 = '7.1.6'
+  s.version = '7.1.7'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/lib/medium/474_ones_and_zeroes.rb b/lib/medium/474_ones_and_zeroes.rb
new file mode 100644
index 00000000..d54d0f7b
--- /dev/null
+++ b/lib/medium/474_ones_and_zeroes.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/ones-and-zeroes/
+# @param {String[]} strs
+# @param {Integer} m
+# @param {Integer} n
+# @return {Integer}
+def find_max_form(strs, m, n)
+  result = ::Array.new(m + 1) { ::Array.new(n + 1, 0) }
+  strs.each do |str|
+    zeros = 0
+    ones = 0
+    str.each_char do |char|
+      if char == '0'
+        zeros += 1
+      else
+        ones += 1
+      end
+    end
+
+    (zeros..m).reverse_each do |i|
+      (ones..n).reverse_each do |j|
+        result[i][j] = [result[i][j], result[i - zeros][j - ones] + 1].max
+      end
+    end
+  end
+
+  result[m][n]
+end
diff --git a/test/medium/test_474_ones_and_zeroes.rb b/test/medium/test_474_ones_and_zeroes.rb
new file mode 100644
index 00000000..cd64c4fc
--- /dev/null
+++ b/test/medium/test_474_ones_and_zeroes.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/474_ones_and_zeroes'
+require 'minitest/autorun'
+
+class OnesAndZerosTest < ::Minitest::Test
+  def test_default_one
+    assert_equal(
+      4,
+      find_max_form(
+        %w[10 0001 111001 1 0],
+        5,
+        3
+      )
+    )
+  end
+
+  def test_default_two
+    assert_equal(
+      2,
+      find_max_form(
+        %w[10 0 1],
+        1,
+        1
+      )
+    )
+  end
+end