def main():
    n = int(input())
    a = list(map(int, input().split()))

    M = 30
    R = n * M

    cnt_zero = [0] * (2 * R + 1)
    cnt_non_zero = [0] * (2 * R + 1)

    ans = n * (n + 1) // 2
    for x in range(1, M + 1):
        b = [a[i] - x for i in range(n)]
        
        s = [0] * (n + 1)
        for i in range(n):
            s[i + 1] = s[i] + b[i]
        
        for i in range(n):
            if b[i] == 0:
                cnt_zero[R + s[i]] += 1
                ans -= cnt_zero[R + s[i + 1]] + cnt_non_zero[R + s[i + 1]]
            else:
                cnt_non_zero[R + s[i]] += 1
                ans -= cnt_zero[R + s[i + 1]]

        for i in range(n):
            if b[i] == 0:
                cnt_zero[R + s[i]] = 0
            else:
                cnt_non_zero[R + s[i]] = 0

    ans += 1
    print(ans)

if __name__ == "__main__":
    main()