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#C, score 5#
Works up to 23, not guaranteed above that.
( ((n+4)>>2)&4 ) + n & 15
((n+4)>>2)&4 returns 4 for n>=12. Add it to n and you get the right answer in the least significant 4 bits, then truncate the other bits.
((n+4)>>2)&4
Should workWorks up to 23, not guaranteed above that.
((n+4)>>2)&4 returns 4 for n>12n>=12. Add it to n and you get the right answer in the least significant 4 bits, then truncate the other bits.
Should work up to 23, not guaranteed above that.
((n+4)>>2)&4 returns 4 for n>12. Add it to n and you get the right answer in the least significant 4 bits, then truncate the other bits.
