N = int(input())
A = [int(_) for _ in input().split()]
cumsum = [0]
for a in A:
    cumsum += [cumsum[-1] + a]
ans = 0
for i in range(N):
    for j in range(i + 1, N + 1):
        ans += cumsum[j] - cumsum[i] == 0
print(ans)
