Problem 1001 a,b,c只是指单个字符还是可以分别由字符串构成？

blllz | 2015-04-04 19:07:33Author
RT
dmcyer | 2015-04-05 06:23:25# 1
dange
BestCoder Contest System 2.0
Copyright © 2014-2025 HDU ACM Team