Before death, I am life itself

This summary of the three games.
The first day is a simple question, but did not learn of scanning lines, at a disadvantage.
The next day details of the problem and the amount of code problem above normal, the question people still face the question wrong. I think leads to less time, T1 and T2 time, although it would like to write is to write not moving.
The third question is NOIP2018day2 style, more difficult. I could get a lot of points, the examination room to explain their experience and level of thinking has been relatively mature.