On Oct 4, 1:50 am, n00m <n... at narod.ru> wrote: > It can be not so "simple". > There can be multiple input files, > with *total* size ~30-50-80 MB. According to one of the global moderators, the 20s time limit is for each input file: https://www.spoj.pl/forum/viewtopic.php?f=6&t=4667 John