[题目](http://noi.openjudge.cn/ch0111/06/)
by 无声告白 @ 2018-08-19 18:05:56
@[汤畅](/space/show?uid=95050) Usaco2007 Mar Monthly Expense
by WSEDSWZD @ 2018-08-19 18:15:00
@[WSEDSWZD](/space/show?uid=66141) 谢谢
by 无声告白 @ 2018-08-19 18:20:12