http://acm.bupt.edu.cn/onlinejudge/newoj/ShowContest/contest_detail.php?contest_id=298
http://blog.renren.com/blog/240725952/874409729
A. [数据结构] B. [自动机 or 数位DP] C. [找guilv]
D. [???] E.[构造] F.[???] G.[??] H.[???] I.[???] J.[抛物线与直线求交]
B.
http://www.codechef.com/problems/FAVNUM
http://paste.ubuntu.com/1405062/
C.
http://acm.mipt.ru/judge/problems.pl?browse=yes&CGISESSID=d04af1c18f2f290ae9b2a9df3b3f70ee&problem=101
http://new.tyvj.cn/Problem_Show.aspx?id=1984
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