描述http://noi.openjudge.cn/english/23/

How many positive integers are there which is less than N and is a multiple of 3 or a multiple of 5.

输入

One positive integer N (N <= 100000).

输出

One integer.

描述:

有多少个小于3 or 5的正整数

输入：

一个正整数N(小于等于100000)

输出：

一个整数
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