12. Checking for Prime #2
You are given a natural number n. Check if the number is prime.
Input
In the first line, a natural number is given, n(1≤n≤109).
Output
In a single line, if the number is prime, output Yes, otherwise output No.
Sample input 1
1
Sample output 1
No
Sample input 2
2
Sample output 2
Yes
Sample input 3
4
Sample output 3
No
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