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  1.  
  2. import java.io.BufferedReader;
  3. import java.io.IOException;
  4. import java.io.InputStreamReader;
  5.  
  6. class Ideone{
  7. 	public static void main(String[] args) throws IOException {
  8. 		// TODO Auto-generated method stub
  9. 		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
  10. 		int evenNum = 0;
  11. 		int a = 0;
  12. 		int b = 0;
  13. 		int[] prime;
  14. 		int num = 0;
  15. 		boolean[] c;
  16. 		boolean wrong = false;
  17.  
  18. 		while(true) {
  19. 			evenNum = Integer.parseInt(bf.readLine());
  20. 			if(evenNum == 0) break;
  21.  
  22. 			prime = new int[evenNum];
  23. 			c = new boolean[evenNum + 1]; 
  24. 			c[0] = c[1] = true;
  25. 			for(int i = 2; i <= evenNum; i++) {
  26. 				if(c[i] == false) {
  27. 					prime[num++] = i;
  28. 				}
  29.  
  30. 				for(int j = i + i; j <= evenNum; j += i) c[j] = true;
  31. 			}
  32.  
  33. 			for(int i = 1; i < num; i++) {  
  34. 				a = prime[i];
  35. 				b = evenNum - a;
  36. 				if(c[b] == false) {
  37. 					wrong = true;
  38. 					break;
  39. 				}	
  40. 			}
  41.  
  42. 			if(wrong) System.out.println(evenNum + " = " + a + " + " + b);
  43. 			else System.out.println("Goldbach's conjecture is wrong.");
  44. 		}
  45. 	}
  46.  
  47. }
  48.  
Runtime error #stdin #stdout #stderr 0.09s 27756KB
comments (?)
stdin
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6
6
6
6
6
0
stdout
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6 = 3 + 3
6 = 3 + 3
stderr
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Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 6
	at Ideone.main(Main.java:27)
https://ideone.com/i5cRNW
language:
Java (12.0.1)
created:
5 years ago
visibility:
public

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