There are 54 playing cards in a deck, how many cards must be drawn at least so that at least 2 of them have the same points?
一副扑克牌有54张，最少要抽取几张牌，方能使其中至少有2张牌有相同的点数？
<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>