coin100,coin25,coin1 = map(int,[input() for x in range(3)])

if coin1>=25:
    coin25+=coin1//25
    coin1%=25
if coin25>=4:
    coin100+=coin25//4
    coin25%=4
if coin100>=10:
    coin100%=10

wallet=coin100+coin25+coin1
print(wallet)