l,m,n = [int(input()) for _ in range(3)]
c = 0
sum = l + 25*m + 100*n
sum = l + 25*m + 100*n
s1 = int(sum / 1000)
sum = int(sum % 1000)
s2 = int(sum/100)
sum = int(sum%100)
s3 = int(sum/25)
sum = int(sum%25)

print(s2+s3+sum)