Emirp
An emirp is a prime whose reversal is a DIFFERENT prime (13 → 31). Is N an emirp?
Input: one integer N.
Output: YES or NO.
Constraints:
- 1 ≤ N ≤ 109
Sample Tests
Input 1
13
Output 1
YES
Input 2
14
Output 2
NO
Discussion (opens after you solve — no spoilers before)
No comments yet.