I must say that color of rating system changed a lot which is fresh and interesting for me to return back. During the contest, I didn't pay much competitive feelings, solving problems in a cool mood. But the bugs in my dirty code is more than before. The long long type leads that one submission of wrong answer in problem C and failure of solving problem D, Which is a painful lesson reminds me to be more carefully in future. As a result, I earn 93 ratings and became cyan the color of Cyan Rose which is the name of sword of Eugeo. Make this be a new start of me, the zaza of c.