Erik Curiel wrote: > Fucking cheaters. Bram, did you code it? I did it in my head. That's > why it's called a "puzzle" and not a "coding problem".
In my head. The trick is to realize that the only thing which matters in terms of change in digit sum is the number of carries. Zero carries causes an increase of one, one carry causes a decrease of 8, and two carries causes a decrease of 17. Hence, the last two digits must be 9, and the other two are easy to figure out. -Bram _______________________________________________ Bits mailing list [EMAIL PROTECTED] http://www.sugoi.org/mailman/listinfo/bits
