n = int(input())
a = list(map(int,input().split()))
m = max(a); s = n*(n-1)//2+1
for i in range(1,m+1):
    b = [0]; d = {}
    for v in a: b.append(b[-1]+v-i)
    for i,v in enumerate(b):
        if v in d and d[v][-1]==i-1: s -= len(d[v])-1; d[v].append(i)
        else: d[v] = [i]
print(s)