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  1. import java.util.concurrent.ForkJoinPool;
  2. import java.util.concurrent.RecursiveAction;
  3. import java.util.concurrent.atomic.AtomicLong;
  4.  
  5.  
  6. public class Main {
  7.  
  8. 	public static void main(String[] args) {
  9. 		AtomicLong same = new AtomicLong();
  10. 		AtomicLong diff = new AtomicLong();
  11.  
  12. 		ForkJoinPool pool = new ForkJoinPool();
  13. 		pool.invoke(new Count(0, 0x100000000l, same, diff));
  14.  
  15. 		System.out.printf("same = %d, different = %d\n", same.get(), diff.get());
  16. 	}
  17.  
  18. 	public static class Count extends RecursiveAction {
  19.  
  20. 		private static final long serialVersionUID = -6040618696103638659L;
  21.  
  22. 		protected final long max, min;
  23. 		protected final AtomicLong same, diff;
  24.  
  25. 		public Count(long min, long max, AtomicLong same, AtomicLong diff) {
  26. 			this.min = min;
  27. 			this.max = max;
  28. 			this.same = same;
  29. 			this.diff = diff;
  30. 		}
  31.  
  32. 		@Override
  33. 		protected void compute() {
  34. 			if (max - min <= (1 << 16)) {
  35. 				int same = 0;
  36. 				int diff = 0;
  37.  
  38. 				for (long i = this.min; i < this.max ; i++) {
  39. 					float f = Float.intBitsToFloat((int)i);
  40. 					if (f * 1.0f == f) {
  41. 						same++;
  42. 					} else {
  43. 						diff++;
  44. 					}
  45. 				}
  46.  
  47. 				this.diff.addAndGet(diff);
  48. 				this.same.addAndGet(same);
  49. 			} else {
  50. 				long mid = min + (max - min) / 2;
  51. 				invokeAll(new Count(min, mid, same, diff), new Count(mid, max, same, diff));
  52. 			}
  53. 		}
  54.  
  55. 	}
  56. }
  57.  
Time limit exceeded #stdin #stdout 5s 381696KB
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https://ideone.com/skrpif
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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