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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.math.*;
  4.  
  5. class Main
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		long sum = 0;
  10. 		for(long i = 1; ; i++) {
  11. 			long n = fib(i);
  12. 			if(n >= 4000000) {
  13. 				break;
  14. 			}
  15.  
  16. 			if(n % 2 == 0) {
  17. 				System.out.println("n : " + n );
  18. 				sum += n;
  19. 			}
  20. 		}
  21. 		System.out.println("sum : " + sum );
  22. 	}
  23.  
  24. 	private static long fib(long n) {
  25. 		if(n == 0 || n == 1) {
  26. 			return 1;
  27. 		}
  28.  
  29. 		long n0 = 1;
  30. 		long n1 = 1;
  31. 		long curr = n0 + n1;
  32. 		for(long i = 1; i < n; i++) {
  33. 			curr = n0 + n1;
  34. 			n0 = n1;
  35. 			n1 = curr;
  36. 		}
  37.  
  38. 		return curr;
  39. 	}
  40. }
Success #stdin #stdout 0.08s 212416KB
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Standard input is empty
stdout
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n : 2
n : 8
n : 34
n : 144
n : 610
n : 2584
n : 10946
n : 46368
n : 196418
n : 832040
n : 3524578
sum : 4613732
https://ideone.com/eJBsJ
language:
Java (HotSpot 12)
created:
14 years ago
visibility:
public

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