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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	private static final int daysInMonth[] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
  11.  
  12. 	public static void main (String[] args) throws java.lang.Exception
  13. 	{
  14. 		long start = System.currentTimeMillis();
  15. 		for (int i=0;i<1000000;i++) {
  16. 			for (int m=1;m<=12;m++){
  17. 				days1(m);
  18. 			}
  19. 		}
  20. 		long end = System.currentTimeMillis();
  21. 		System.out.println(end-start);
  22.  
  23. 		start = System.currentTimeMillis();
  24. 		for (int i=0;i<1000000;i++) {
  25. 			for (int m=1;m<=12;m++){
  26. 				days2(m);
  27. 			}
  28. 		}
  29. 		end = System.currentTimeMillis();
  30. 		System.out.println(end-start);
  31.  
  32. 		start = System.currentTimeMillis();
  33. 		for (int i=0;i<1000000;i++) {
  34. 			for (int m=1;m<=12;m++){
  35. 				days3(m);
  36. 			}
  37. 		}
  38. 		end = System.currentTimeMillis();
  39. 		System.out.println(end-start);
  40. 	}
  41.  
  42. 	public static int days1(int m) {
  43. 		return (0xEEFBB3>>(m-1)*2 & 0b11) + 28;
  44. 	}
  45.  
  46. 	public static int days2(int x) {
  47. 		return 28 + (x + (int)Math.floor(x/8)) % 2 + 2 % x + 2 * (int)Math.floor(1/x);
  48. 	}
  49.  
  50. 	public static int days3(int month) {
  51. 		return daysInMonth[month];	
  52. 	}
  53. }
Success #stdin #stdout 1.32s 380160KB
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1202
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https://ideone.com/bouoZO
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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