USTC Monthly Contest 2011-04-10 / 解题报告

比赛链接

解题报告链接(开坑不解释)：

ASquare Root11.1%4/36
BShortest Subsequence25.5%25/98
CDraw a Circle to Curse You!0.0%0/0
DPacking chocolate0.0%0/0
EWeight loss plan0.0%0/0
FCrazy Biscuits25.0%24/96
GAcademic Report in USTC43.8%7/16
HThe World Of Dango0.0%0/4

 

分析：

B 串的问题 dp?

F 拓扑排序？差分约束？