[518. Coin Change 2] #leetcode

518_1019.py

class Solution(object):
    def change(self, amount, coins):
        """
        :type amount: int
        :type coins: List[int]
        :rtype: int
        """
        # dp placeholder
        dp = [0] * (amount+1)
        dp[0] = 1
        
        for i in coins:
            for j in range(1, amount+1):
                if j - i >= 0:
                    dp[j] += dp[j-i]
        
        return dp[amount]