11. Checking for Prime #1
You are given a natural number n. Check if the number is prime.
Input
The first line contains a natural number, n(1≤n≤560).
Output
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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