#yuki647
import sys

n=int(raw_input())
ab=[]
for i in xrange(n):
 a,b=map(int,raw_input().split())
 ab.append([a,b])
m=int(raw_input())
xy=[]
for i in xrange(m):
 x,y=map(int,raw_input().split())
 xy.append([x,y,0,i+1])
ab.sort()
xy.sort()
for i in xrange(n):
 for j in xrange(m):
  if xy[j][0]<=ab[i][0] and xy[j][1]>=ab[i][1]:
   xy[j][2]+=1
  if xy[j][0]>ab[i][0]:
   break
res=sorted(xy,key=lambda x:x[2], reverse=True)
if res[0][2]==0:
 print 0
 sys.exit()
print res[0][3]
for i in xrange(1,m):
 if res[i][2]==res[0][2]:
  print res[i][3]
 else:
  break