import strutils, sequtils, algorithm
proc getInts: auto = stdin.readLine.split.map parseInt

let N = stdin.readLine.parseInt
var person = newSeq[tuple[cost, taste: int]](N)

for i in 0 ..< N:
  (person[i].cost, person[i].taste) = getInts()

let M = stdin.readLine.parseInt
var mentai = newSeq[tuple[cost, taste, pop: int]](M)

for j in 0 ..< M:
  (mentai[j].cost, mentai[j].taste) = getInts()
  for i in 0 ..< N:
    if mentai[j].cost <= person[i].cost:
      if mentai[j].taste >= person[i].taste:
        mentai[j].pop += 1

let best = sortedByIt(mentai, -it.pop)[0].pop
if best > 0:
  for j in 0 ..< M:
    if mentai[j].pop == best:
      echo j + 1
else:
  echo 0