n = int(input())
A = list(map(int, input().split()))

ans = 0

for t in range(1, 31):
    B = [a - t for a in A]
    tot = 0
    cnt = {}
    for b in B:
        cnt[tot] = cnt.get(tot, 0) + 1
        if b == 0:
            ans += cnt.get(tot, 0)
        tot += b


print(n * (n + 1) // 2 - ans + 1)