AlphaAC..I tried for almost 1 hr 30 min and still trying. I can't solve it. That's why I asked for that after contest. I don't get what you are trying to say?
I think you can read other's code after contest.If you are still not able to understand how to solve the problem,you can send message to those who have solved it for help,most of them will be glad to help you .
Uh...But I am just a Chinese junior high school student...
I can only speak a little English,and It's difficult for me to write the editorial in English...
@mikulover.: How to send the messages to other users ? I don't know that....can you tell me?
@admin.: The red coders and others can help you ?? So many users know English and I guess you also know English that is good enough for a editorial. From your last comment it seems that your writing is good. It helps those who are weak in Chinese or don't know Chinese at all.