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Problem 3643. -- Phi的反函数 -- 衡阳八中OJ离线版-2014-11-04

3643: Phi的反函数

Time Limit: 10 Sec  Memory Limit: 64 MB
Submit: 45  Solved: 23
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Description

Input

Output

Sample Input

4

Sample Output

5

HINT

Source

By Zky

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