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Update 0518.零钱兑换II.md
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Java:
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Java:
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```Java
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class Solution {
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public int change(int amount, int[] coins) {
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//递推表达式
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int[] dp = new int[amount + 1];
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//初始化dp数组,表示金额为0时只有一种情况,也就是什么都不装
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dp[0] = 1;
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for (int i = 0; i < coins.length; i++) {
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for (int j = coins[i]; j <= amount; j++) {
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dp[j] += dp[j - coins[i]];
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}
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}
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return dp[amount];
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}
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}
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```
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Python:
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Python:
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