Day 44

Day 44

518. 零钱兑换 II

class Solution:
    def change(self, amount: int, coins: List[int]) -> int:
        dp = [0] * (amount + 1)
        dp[0] = 1

        for i in range(len(coins)):
            for j in range(coins[i], amount + 1):
                dp[j] += dp[j - coins[i]]

        return dp[amount]

377. 组合总和 Ⅳ

class Solution:
    def combinationSum4(self, nums: List[int], target: int) -> int:
        dp = [0] * (target + 1)
        dp[0] =1 
        for i in range(1, target + 1):
            for j in range(len(nums)):
                if i - nums[j] >= 0:
                    dp[i] += dp[i - nums[j]]

        return dp[target]