from collections import Counter
N=int(input())
A=list(map(int,input().split()))
ans=N*(N+1)//2
for i in range(1,30):
	cum=[0]*(N+1)
	for j in range(N):
		cum[j+1]=cum[j]+(A[j]-i)
	left=Counter()
	dl=Counter()
	cnt2=Counter({0:1})
	for j in range(N):
		if A[j]!=i:
			left[cum[j]]+=1
		if A[j]!=i:
			dl[cum[j+1]]+=left[cum[j+1]]
		cnt2[cum[j+1]]+=1
	for c in cnt2:
		ans-=(cnt2[c]*(cnt2[c]-1)//2-dl[c])
print(1+ans)