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P518.java
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/*
518. 零钱兑换 II
https://leetcode-cn.com/problems/coin-change-2/
给定不同面额的硬币和一个总金额。写出函数来计算可以凑成总金额的硬币组合数。假设每一种面额的硬币有无限个。
示例 1:
输入: amount = 5, coins = [1, 2, 5]
输出: 4
解释: 有四种方式可以凑成总金额:
5=5
5=2+2+1
5=2+1+1+1
5=1+1+1+1+1
示例 2:
输入: amount = 3, coins = [2]
输出: 0
解释: 只用面额2的硬币不能凑成总金额3。
示例 3:
输入: amount = 10, coins = [10]
输出: 1
注意:
你可以假设:
0 <= amount (总金额) <= 5000
1 <= coin (硬币面额) <= 5000
硬币种类不超过 500 种
结果符合 32 位符号整数
*/
public class P518 {
public static void main(String[] args) {
int amount = 5;
int[] coins = {1, 2, 5};
System.out.println(new Solution().change(amount, coins));
}
static class Solution {
public int change(int amount, int[] coins) {
return -1;
}
}
}