How many numbers can be selected from the 24 numbers 1, 2, 3...23, 24, so that each number is not twice the other number.
从1，2，3…23，24这24个数中至多能选出多少个数，使选出的数中，每一数都不是另一数的两倍．
<gadget id="calculator">24 - 13</gadget>
<output>11</output>

<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<gadget id="calculator">12 + 4</gadget>
<output>16</output>

<result>16</result>