下面Python代码用于将输入金额换成最少币种组合方案，其实现算法是( )。

def findCoins(coins, Money):

coins_used = [] 

for coin in coins:

while Money >= coin: 

coins_used.append(coin)

Money -= coin

return coins_used

coins = [100, 50, 20, 10, 5, 2, 1] #货币种类，单位相同

M = int(input()) #输入换算的金额coins_needed = find_coins(coins, M)

result = [(c,coins_needed.count(c)) for c in coins] 

result = [x for x in result if x[1] > 0]