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Re:请教一个问题:找零钱问题 贪心?动态规划?

Posted by alpc02 at 2007-01-29 11:31:21
In Reply To:请教一个问题:找零钱问题 贪心?动态规划? Posted by:faen at 2007-01-29 11:12:29
> 一套钱币的硬币种类有四种,价值分别是:1 5 10 25,  要找出零钱价值为n, 问最少需要多少个硬币。  
> 我知道这个可以贪心求解。
> 但是对于另一套硬币种类,假设有三种:1,10,25 ,那么如果要找出零钱30,则用贪心不能够求出最优解,这个时候应该用动态规划。
> 我想问的是,如果判断一套硬币系统,可以用贪心来求解
第二种应该也可以用贪心解决的,只不过不能太贪心

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