# frozen_string_literal: true

MEMBERS = gets.to_i.times.map { gets.chomp.split.map(&:to_i) }
FOODS = gets.to_i.times.map { gets.chomp.split.map(&:to_i) }

FOODS_WITH_NUM = MEMBERS.map do |value, hot|
  FOODS.map.with_index do |food, index|
    index if food[0] <= value && food[1] >= hot
  end
end.flatten.compact.sort.group_by(&:itself).map { |i, j| [i, j.size] }

MAXS = FOODS_WITH_NUM.filter do |_, j|
  j == (FOODS_WITH_NUM.max_by { |_, k| k } || [nil, 0])[1]
end

if MAXS.empty?
  puts 0
  exit
end

puts(MAXS.map { |k, _v| k + 1 }
         .uniq
         .sort
         .join("\n"))