#!/usr/bin/env ruby

class Main
  def run
    current = 50
    count = 0

    $stdin.each_line do |line|
      direction, magnitude = line[0], line[1..].to_i

      loop do
        case direction
        when "R"
          current = (current + 1) % 100
        when "L"
          current = (current - 1) % 100
        end

        if current == 0
          count += 1
        end

        magnitude -= 1
        break if magnitude == 0
      end
    end

    puts count
  end
end

Main.new.run