import sys
input=lambda:sys.stdin.readline().rstrip()
N=int(input())
a=list(map(int,input().split()))
for i in range(1,3):
	a[i]+=a[i-1]
ans=0
S=[0]+list(map(len,input().split()))
for i in range(1,N+1):
	S[i]+=S[i-1]
S=set(S)
for i in S:
	ans+=all([(i+j in S) for j in a])
print(ans)