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


ru = [0] * (n + 1)
for i in range(n):
    ru[i + 1] = ru[i] ^ a[i]

li = ru[1:-1]
n = len(li)

dp = [0] * (n + 1)
dp[0] = 1
idxs = {}
ru = [0] * (n + 1)

for i in range(n):
    ru[i + 1] = ru[i] + dp[i]
    if li[i] not in idxs:
        dp[i + 1] += ru[i + 1]
    else:
        idx = idxs[li[i]]
        dp[i + 1] += ru[i + 1] - ru[idx + 1]
    idxs[li[i]] = i

print(sum(dp))