n=int(input())
a=list(map(int,input().split()))
sum=[]
sum.append(0)
for i in range(n):
    sum.append(sum[i]+a[i])
#print(sum)
ans=0
for i in range(n+1):
    for j in range(i+1,n+1):
        if sum[j]-sum[i]==0:
            ans +=1
print(ans)