a = int(input())
b = int(input())
c = int(input())

total = 100 * a + 10 * b + c
count = 0

a = int(total / 1000)
total -= a*1000
a = int(total/ 100)
total -= a*100
a = int(total/25)
total -= a*25
count += a
print(count)