User blog comment:MachineGunSuper/Fun Problem/@comment-80.98.179.160-20180114161953/@comment-80.98.179.160-20180122174150


 * 1) 90. 10 and 99 are 2-digit but 100 isn't, and 11,12,...,98 too.
 * 2) 0 tP. You didn't specify input size.