CERC2012
http://www.lydsy.com/JudgeOnline/problemset.php?search=cerc2012
bzoj4057-4065+3115+3169
2012 Asia Tianjin Regional Contest
http://acm.hdu.edu.cn/search.php?field=problem&key=2012%20Asia%20Tianjin%20Regional%20Contest&source=1&searchmode=source
hdu4431~4441
补一些算法、某些类型的DP。
定期写几道恶心码农题。
It will be a hard time, I know it, so you have to be persistent.