# frozen_string_literal: true

class Array # rubocop:todo Style/Documentation
  def solve # rubocop:todo Metrics/AbcSize
    a = each_with_object({}) do |item, result|
      result[item[0]] ||= []
      result[item[1]] ||= []
      result[item[0]] << item[1]
      result[item[1]] << item[0]
    end
    a.map { |_k, v| [v.size - 2, 0].max }.sum
  end
end

N = gets.to_i
A = (N - 1).times.map { gets.chomp.split.map(&:to_i) }

RESULT = A.solve

puts RESULT