local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end

local n = io.read("*n", "*l")
local str = io.read()
local a = {}
for w in str:gmatch("%d+") do
  table.insert(a, lltonumber(w))
end
local ret = 1LL
local t = {}
for i = 1, n do
  t[i] = {}
  local ai = a[i]
  for j = 1, 60 do
    t[i][j] = ai % 2LL == 1LL
    ai = ai / 2LL
  end
end
for j = 1, 60 do
  for i = 1, n do
    if t[i][j] then
      ret = ret + ret
      for k = i + 1, n do
        for l = j, 60 do
          if t[i][l] then
            t[k][l] = not t[k][l]
          end
        end
      end
      for k = j, 60 do
        t[i][k] = false
      end
      break
    end
  end
end
ret = tostring(ret):gsub("LL", "")
print(ret)