hund = int(input())
twofive = int(input())
one = int(input())

total = 100*hund + 25*twofive + one

count = 0

a = int(total/1000)
total -= a*1000

a = int(total/100)
total -= a*100
count += a

a = int(total/25)
total -= a*25
count += a

count += total

print(count)