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4676: B3786 [信息与未来 2023] 幸运数字
Memory Limit:128 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:69
Solved:31
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Description
Input
Output
Sample Input
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1 100
Sample Output
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9
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https://www.luogu.com.cn/problem/B3786
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