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4265: 【入门】超市卖电池
Memory Limit:16 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:92
Solved:33
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Description
某超市卖电池,每节电池2元钱。若数量超过10节,则可打9折。请输入购买电池节数,打印相应价钱(得到保留一位小数)。
Input
一行,一个整数
Output
一行,相应的价钱
Sample Input
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13
Sample Output
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23.4
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