Description

Submission

class Solution {
public:
    int change(int amount, vector<int>& coins) {
        vector<int> dp(amount+1);
        dp[0] = 1;

        for(auto x: coins) {
            for(int i = x; i <= amount; ++i) {
                dp[i] += dp[i-x];
            }
        }

        return dp[amount];
    }
};