include Math

N = gets.to_i
A = gets.split().map(&:to_i)
dp = A.dup
d = 0
while dp.max > 0
  m = dp.max
  dp.each_with_index do |a, i|
    if a > 0 and log2(a).floor == log2(m).floor
      dp[i] ^= m
    end
  end
  d += 1
end
ans = 2**d
puts ans