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#BZOJ1223. [HNOI2002]Kathy函数
ID: 24585
Type: Default
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
Hydro
[HNOI2002]Kathy函数
题目描述
输入格式
仅有一行,为正整数m
输出格式
输出仅有一个正整数,表示所有的满足f(n)=n,(n<=m) 的自然数的个数。
5
3
f提示
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