N = int(input())
A = list(map(int,input().split()))

MAX = 40000
dp = [[False] * (MAX) for _ in range(N+1)]
dp[0][0] = True

for i in range(N):
  for j in range(MAX):
    if not dp[i][j]:
      continue

    dp[i+1][j] = True
    dp[i+1][j^A[i]] = True

print(sum(dp[N]))