import itertools
n = int(input())
a = list(map(int,input().split()))
b = [[0 for j in range(n)] for i in range(31)]
for i in range(31):
    for j in range(n):
        b[i][j] = a[j] - i
    b[i] = list(itertools.accumulate(b[i])) + [0]
ans = 0
import collections
c = [collections.defaultdict(int) for i in range(31)]
for i in reversed(range(n)):
    for j in range(31):
        c[j][b[j][i]] += 1
    ans -= c[a[i]][b[a[i]][i]]
    #print(i,c[a[i]][b[a[i]][i]])

a.reverse()
b = [[0 for j in range(n)] for i in range(31)]
for i in range(31):
    for j in range(n):
        b[i][j] = a[j] - i
    b[i] = list(itertools.accumulate(b[i])) + [0]

import collections
c = [collections.defaultdict(int) for i in range(31)]
for i in reversed(range(n)):
    for j in range(31):
        c[j][b[j][i]] += 1
    ans -= c[a[i]][b[a[i]][i]]
    #print(i,c[a[i]][b[a[i]][i]])

    
ans += n*(n+1)//2
print(ans+1)