n_100=int(input())
n_25=int(input())
n_1=int(input())
money=100*n_100+25*n_25+n_1
li=[100,25,1]
ans=0
money-=(money//1000)*1000
for i in range(3):
    ans+=money//li[i]
    money-=(money//li[i])*li[i]
print(ans)