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:
            if d[v][2]==i-1: d[v][1] += 1; d[v][2] = i
            else: d[v][0] += 1; d[v][1] += 1; d[v][2] = i
        else: d[v] = [1,1,i]
    for p,q,_ in d.values(): s -= q*(q-1)//2-p*(p-1)//2
print(s)