*Problem 1620 - Contest 8B-4 fractal square [#n82daf06] [[prev>Problem 1619]] | [[next>Problem 1621]] #get_img(1620) #br |Author|Limit|h |snuke|24| #br **関連 [#j8b08cf6] #br **コメント [#t86f52a3] #pcomment(reply)