N = gets.to_i
persons = N.times.map { gets.split.map(&:to_i) }

M = gets.to_i
mentaikos = M.times.map { gets.split.map(&:to_i) }

max_cnt = 1
ans = []

mentaikos.each.with_index(1) do |(x, y), idx|
  cnt = 0

  persons.each do |a, b|
    next if a < x
    next if b > y

    cnt += 1
  end

  if max_cnt < cnt
    max_cnt = cnt
    ans = [idx]
  elsif max_cnt == cnt
    ans << idx
  end
end

if ans.empty?
  puts 0
else
  puts ans
end