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

    M = 30
    R = n * M


    ans = n * (n + 1) // 2
    
    cnt = [0] * (R + 1)
    
	# [x or not x, \cdots, x]
    for x in range(1, M + 1):
        b = [a[i] - x for i in range(n)]
        C = n * x
        
        s = [0] * (n + 1)
        for i in range(n):
            s[i + 1] = s[i] + b[i]
        
        for i in range(n):
            cnt[C + s[i]] += 1
            if b[i] == 0:
                ans -= cnt[C + s[i + 1]]

        for i in range(n):
            cnt[C + s[i]] = 0

	# [x, \cdots, not x]
    for x in range(1, M + 1):
        b = [a[i] - x for i in range(n)]
        C = n * x
        
        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[C + s[i]] += 1
            else:
                ans -= cnt[C + s[i + 1]]

        for i in range(n):
            if b[i] == 0:
                cnt[C + s[i]] = 0


    ans += 1
    print(ans)

if __name__ == "__main__":
    main()