from collections import defaultdict

M = 30

def main():
    n = int(input())
    a = list(map(int, input().split()))
    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]
        
        map_zero = defaultdict(int)
        map_non_zero = defaultdict(int)
        
        for i in range(n):
            if b[i] == 0:
                map_zero[s[i]] += 1
                ans -= map_zero[s[i + 1]] + map_non_zero[s[i + 1]]
            else:
                map_non_zero[s[i]] += 1
                ans -= map_zero[s[i + 1]]
    
    ans += 1
    print(ans)

if __name__ == "__main__":
    main()