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题目描述:
image
解题过程:
今天终于开张了,来到了完全背包问题我发现我对背包问题的抽象又进一步理解了,一遍过,舒服得雅痞
代码:

class Solution {
public:
    int change(int amount, vector<int>& coins) {
        int n = coins.size();
        vector<int> dp(amount+1);
        dp[0] = 1;
        for (int n : coins) {
            for (int i = n; i <= amount; i++) {
                dp[i] = dp[i]+dp[i-n];
            }
        }
        return dp[amount];
    }
};