# frozen_string_literal: true

def assert_equal(x, y)
  raise [x, y].inspect unless x == y
end

class Solution
  def self.run(string)
    max, current = 0, 0

    0.upto(string.size - 1) do |i|
      if string[i] == string[i-1]
        max = maximum(max, current)
        current = 0
      end
      current += 1
    end

    maximum(max, current)
  end

  def self.maximum(x, y)
    x > y ? x : y
  end
end

assert_equal Solution.run('abrkaabcdefghijjxxx'), 10
assert_equal Solution.run('aaabcd'), 4
puts "YAY!"

# step 1. understand the problem
# step 2. pick a solution
# step 3. write the solution