import math
hundred = input()
hundred = int(hundred)
quarter = input()
quarter = int(quarter)
one = input()
one = int(one)
total = hundred * 100 + quarter * 25 + one * 1
bill = total / 1000
coin = total - math.floor(bill) * 1000
coin_num = 0
hund_coin = coin / 100
if hund_coin > 0:
    coin = coin - math.floor(hund_coin) * 100 
    coin_num = coin_num + math.floor(hund_coin)
quart_coin = coin / 25
if quart_coin > 0:
    coin = coin - math.floor(quart_coin) * 25
    coin_num = coin_num + math.floor(quart_coin)
one_coin = coin / 1
if one_coin > 0:
    coin_num = coin_num + math.floor(one_coin)
print(coin_num)