118 reputation
3
bio website halfelf.me
location 景德镇 - Beijing
age 28
visits member for 1 year, 8 months
seen Feb 5 '13 at 12:03

IT worker, Apple Fan, Hardcore PC/Board/TRPG Gamer, Poet, PKU Dropout, Rubyist


Jan
6
comment Probability of two integers' square sum divisible by $10$
Oh, thanks. It is so clear and I should had figured it out.