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Problem C
Primality
Given a positive integer $N$, determine whether it is prime or not.
Input
The first line contains the integer $N$ ($2 \le N \le 10^{18}$).
Output
Output YES if $N$ is prime, and NO otherwise.
Scoring
Your solution will be tested on a set of test groups, each worth a number of points. To get the points for a test group you need to solve all test cases in the test group.
|
Group |
Points |
Constraints |
|
$1$ |
$1$ |
$N \le 10^{16}$ |
|
$2$ |
$1$ |
No additional constraints |
| Sample Input 1 | Sample Output 1 |
|---|---|
6 |
NO |
| Sample Input 2 | Sample Output 2 |
|---|---|
7 |
YES |
