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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		int a, b;
  9.     	int number1, number2;
  10. 	   	int counter = 0;
  11. 		Scanner sc = new Scanner(System.in);
  12. 		a = sc.nextInt();
  13. 		b = sc.nextInt();
  14. 		if(a > b) {
  15. 			a += b;
  16. 			b = a - b;
  17. 			a -= b;
  18. 		}
  19. 		if (a == 1) counter--;
  20. 		for (int i = a; i <= b; i++){
  21. 			number1 = i; 
  22. 			boolean f1 = true;
  23. 			boolean f2 = true;
  24. 			for (int j = 2; j*j <= number1; j++){					
  25. 				f1 = ((number1%j)!=0);
  26. 				if (!f1) 
  27. 				break;
  28. 			}
  29.          	if (f1){
  30. 				number2 = 0;
  31. 				while (number1 > 0) {
  32. 					number2 = number2*10 + number1%10;
  33. 					number1 /= 10;
  34. 				}
  35. 				for (int j = 2; j*j <= number2; j++){
  36. 					f2 = ((number2%j)!=0);
  37. 					if (!f2) break; 
  38. 				}
  39.              	if (f2) counter++; 
  40.          	}
  41. 		}
  42. 		System.out.format("%d", counter);
  43. 	}
  44. }
Success #stdin #stdout 0.15s 321280KB
comments (?)
stdin 
9900 10000
stdout 
4
https://ideone.com/X7AIAu
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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