Timeline for Can this number be written in (3^x) - 1 format?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Jan 7, 2017 at 9:28 | comment | added | Jasen | yeah, log doesn't work, pow probably won't either. | |
| Jan 6, 2017 at 22:33 | comment | added | Steadybox |
@nmjcman101 Thanks, but pow() produces some incorrect results because of floating point inaccuracy. (When cast to int, 2.9999 will be 2, not 3). Adding a variable r sounds like a good idea, but it actually results in a 2 bytes longer code.
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| Jan 6, 2017 at 18:54 | comment | added | nmjcman101 |
I think you save bytes by using pow(3,i) instead of defining your own. Gcc complains about the missing #include <math.h> but compiles it anyway. I did have to cast to int. You also may be able to gain some by adding an r variable, initializing to -1, and then if(n==k-1)r=i;}return r;}
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| Jan 6, 2017 at 18:24 | review | Low quality posts | |||
| Jan 6, 2017 at 18:25 | |||||
| Jan 6, 2017 at 18:06 | history | answered | Steadybox | CC BY-SA 3.0 |