L = int(input()) * 100
M = int(input()) * 25
N = int(input())

total = L + M + N
count = int(total / 1000)
total = total % 1000
count += int(total / 100)
total = total % 100
count += int(total / 25)
total = total % 25
count += total / 1

print(int(count))