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  1. import java.util.Scanner;
  2.  
  3. public class Main {
  4.     public static void main(String[] args) {
  5.         Scanner sc = new Scanner(System.in);
  6.         int X = sc.nextInt();
  7.         sc.close();
  8.  
  9.         if (isPrime(X)) {
  10.             System.out.println("YES");
  11.         } else {
  12.             System.out.println("NO");
  13.         }
  14.     }
  15.  
  16.     public static boolean isPrime(int n) {
  17.         if (n < 2) {
  18.             return false;
  19.         }
  20.         for (int i = 2; i * i <= n; i++) {
  21.             if (n % i == 0) {
  22.                 return false;
  23.             }
  24.         }
  25.         return true;
  26.     }
  27. }
  28.  
Success #stdin #stdout 0.11s 56632KB
comments (?)
stdin 
7
stdout 
YES
https://ideone.com/0SAwHG
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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