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krahets
2023-08-17 05:12:05 +08:00
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chapter_greedy/greedy_algorithm.md
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![零钱兑换的贪心策略](greedy_algorithm.assets/coin_change_greedy_strategy.png)
<p align="center"> Fig. 零钱兑换的贪心策略 </p>
<p align="center"> 图：零钱兑换的贪心策略 </p>
实现代码如下所示。你可能会不由地发出感叹：So Clean ！贪心算法仅用十行代码就解决了零钱兑换问题。
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![贪心无法找出最优解的示例](greedy_algorithm.assets/coin_change_greedy_vs_dp.png)
<p align="center"> Fig. 贪心无法找出最优解的示例 </p>
<p align="center"> 图：贪心无法找出最优解的示例 </p>
也就是说，对于零钱兑换问题，贪心算法无法保证找到全局最优解，并且有可能找到非常差的解。它更适合用动态规划解决。