l,m,n = [int(input()) for _ in range(3)]
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)

taro = s2+ s3 + sum
print(taro)