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

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

  auto memo = new bool[](2 ^^ 15);
  memo[0] = true;

  foreach (a; ai) {
    auto memo2 = memo.dup;
    foreach (i; 0..memo2.length)
      if (memo[i])
        memo2[a ^ i] = true;
    memo = memo2;
  }

  writeln(memo.count!(a => a));
}