I have one friend aren_dance. His condtribution was near to -25 and he concluded to leave that accaunt and start coding with new one. He was solving 3 problems from div 2 but he is rating have stucked at 1100. In his new account he's solving same 3 problems and near to same time but he easyly managed to get 1360. And we have wroten div 3 we writed it close to each other like both were close to 6000 position. He 1200 became 1260. I 1420 became 1360(my cont.--14 at that moment his-0. So question stays-Does bad contribution make to gain rating harder?