Motto
Success is not final, failure is not fatal. It is the courage to continue that counts.
以斗争求和平，则和平存；以妥协求和平，则和平亡。
愿为江水，与君重逢。
My Competitive Programming Rating
Codeforces
AtCoder
First account: Tangning
Second Account: Number10
Third Accout: chenghuaide