N-B-U-T Online Judge :: NBUT 2012 Weekly - 26th May

[F] Find the Prime Number
时间限制: 1000 ms　内存限制: 65535 K
问题描述
This is a simple problem. Give you a number N. You should tell me it is not a prime number.
输入
This problem has several cases.
For each case just contain one integer N (N <= 5000000).
When the N is a non-postive number end of the input.
输出
If the number is a prime number print "Yes", otherwise print "No"
样例输入
```
2
3
4
5
0
```
样例输出
```
Yes
Yes
No
Yes
```
提示
```
无
```
来源
```
Monkeyde17
```
操作