相关链接
题目传送门：http://www.lydsy.com/JudgeOnline/problem.php?id=4374
神犇题解：http://www.cnblogs.com/clrs97/p/6371735.html
解题报告
这题如果钱的总数小一点就可以直接DP了
于是我就想到了这个题：BZOJ 2749
于是我们就可以把钱给离散化到900以内啦！
但这样我们没有办法进行转移，然后就不会了 QwQ
不过万能的Claris告诉我们，物品只有30个
于是我们可以折半暴搜，这样的话就不需要转移了
直接枚举左侧的值，右侧搞一个指针跟着动一动就好
时间复杂度： $O(nm{2^{\frac{n}{2}}} + n{m^2})$
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