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  1. #define _USE_MATH_DEFINES
  2. #include <math.h>
  3. #include <stdio.h>
  4.  
  5. int myLog2(int x)
  6. {
  7. 	int retVal = 0;
  8. 	int temp;
  9. 	int shift;
  10. 	int y = x;
  11.  
  12. 	temp = y >> 0x10;
  13. 	shift = !!temp << 4;
  14. 	retVal += shift;
  15. 	y >>= shift;
  16.  
  17. 	temp = y >> 0x08;
  18. 	shift = !!temp << 3;
  19. 	retVal += shift;
  20. 	y >>= shift;
  21.  
  22. 	temp = y >> 0x04;
  23. 	shift = !!temp << 2;
  24. 	retVal += shift;
  25. 	y >>= shift;
  26.  
  27. 	temp = y >> 0x02;
  28. 	shift = !!temp << 1;
  29. 	retVal += shift;
  30. 	y >>= shift;
  31.  
  32. 	temp = y >> 0x01;
  33. 	retVal += temp;
  34.  
  35. 	return retVal;
  36. }
  37.  
  38. int main(void)
  39. {
  40. 	for (int i1 = 1; i1 >= 1; i1++)
  41. 	{
  42. 		if (ilogb(i1) != myLog2(i1))
  43. 		{
  44. 			printf("%d\n", i1);
  45. 			break;
  46. 		}
  47. 	}
  48.  
  49. 	return 0;
  50. }
Time limit exceeded #stdin #stdout 5s 9296KB
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https://ideone.com/fSrDyt
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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