anupamsharma

def calculate_coins(c, s):
    #sort the coins
    c = sorted(c)
    
    # remove the coins with values bigger than s
    c = [ci for ci in filter(lambda cv: cv<=s, c)]
    
    # sentinel value to represent that one coin sum is not possible. We can use s + 1 as sentinel value to represent
    # that case. Mininum value of a coin is 1 so more than s coins can not make a sum of s
    sentinel = s+1