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4665: B3877 [信息与未来 2015] 分数计数
Memory Limit:128 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:8
Solved:8
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Description
Input
Output
Sample Input
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10 5
Sample Output
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3
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https://www.luogu.com.cn/problem/B3877
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