import std.algorithm, std.array, std.container, std.range, std.bitmanip;
import std.numeric, std.math, std.bigint, std.random, core.bitop;
import std.string, std.regex, std.conv, std.stdio, std.typecons;

void main()
{
  auto n = readln.chomp.to!size_t;
  auto ai = readln.split.map!(to!long).array;

  bool[long] memo;
  memo[0L] = true;

  foreach (a; ai)
    foreach (i; memo.byKey)
      memo[a ^ i] = true;

  writeln(memo.length);
}