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Problem 4911. -- [Sdoi2017]切树游戏

4911: [Sdoi2017]切树游戏

Time Limit: 40 Sec  Memory Limit: 512 MB
Submit: 369  Solved: 136
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Description

http://www.lydsy.com/JudgeOnline/upload/day1.pdf

Input

Output

Sample Input

Sample Output

HINT

Source

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