from collections import defaultdict

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

ans = N*(N-1)//2+1
for avg in range(1, 31):
    cum = [0]
    for a in A:
        cum.append(cum[-1]+(a-avg))
    L = defaultdict(int)
    R = defaultdict(int)
    for i in range(1, N+1):
        R[cum[i]] += 1
    for i in range(N):
        R[cum[i+1]] -= 1
        if A[i] == avg:
            ans -= L[cum[i]]+R[cum[i]]
        L[cum[i]] += 1
    D = defaultdict(int)
    for i in range(N):
        if A[i] != avg: continue
        ans += D[cum[i]]
        D[cum[i]] += 1

print(ans)