There are 54 playing cards in a deck, how many playing cards must be drawn at least so that at least two of them have the same points. (The big and small ghosts are different)
一副扑克牌有54张，至少抽取多少张扑克牌，方能使其中至少有两张牌有相同的点数．(大小鬼不相同)
<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>