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Problem 5305. -- [Haoi2018]苹果树

5305: [Haoi2018]苹果树

Time Limit: 10 Sec  Memory Limit: 512 MB
Submit: 212  Solved: 175
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Description

JudgeOnline/upload/201804/problemset2.pdf 

Input

Output

Sample Input

Sample Output

HINT

Source

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