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Published: Jul 18, 2021 License: MIT Imports: 0 Imported by: 0

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322. Coin Change

[中等] 动态规划


给定不同面额的硬币 coins 和一个总金额 amount。编写一个函数来计算可以凑成总金额所需的最少的硬币个数。如果没有任何一种硬币组合能组成总金额,返回 -1。

你可以认为每种硬币的数量是无限的。

 

示例 1:


输入:coins = [1, 2, 5], amount = 11
输出:3 
解释:11 = 5 + 5 + 1

示例 2:


输入:coins = [2], amount = 3
输出:-1

示例 3:


输入:coins = [1], amount = 0
输出:0


示例 4:


输入:coins = [1], amount = 1
输出:1


示例 5:


输入:coins = [1], amount = 2
输出:2


 

提示:


	1 <= coins.length <= 12
	1 <= coins[i] <= 231 - 1
	0 <= amount <= 104


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