Does any one have a faster code of python than this

p=int(input())
plist=set()
for i in range (p):
    a=int(input())
    plist.add(a)

s=int(input())
slist=[]
count=0
for i in range (s):
    a=int(input())
    if a in plist:
        count+=1
print (count)

I've no idea how to make it faster. Got stuck myself.