1094. Prime Judge

单点时限: 15.0 sec

内存限制: 256 MB

Given a positive integer, your job is writing a program to determine whether it is a prime number or not.

输入格式

There are thousands of tests. Each test consists of a positive integer (no more than ) on a single line. Input is terminated by end of file.

输出格式

For each integer in the input, print a YES if it is a prime number, otherwise print a NO instead.

样例

Input
4
5
6
Output
NO
YES
NO

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创建: 12 年,10 月前.

修改: 2 年,3 月前.

最后提交: 17 小时前.

来源: partychen

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