coin-change-2.cpp

//Runtime: 6 ms
class Solution {
public:
	int change(int amount, vector<int>& coins) {
		vector<int> dp(amount + 1, 0);
		dp[0] = 1;
		for (int i = 0; i < coins.size(); i++) {
			for (int j = coins[i]; j <= amount; j++) {
				dp[j] += dp[j - coins[i]];
			}
		}

		return dp[amount];
	}
};