# -*- coding: utf-8 -*- 

L = input()
M = input()
N = input()
c = 0

if N / 25 > 0:
    M += N / 25
    c += N % 25
else:
    c += N

if M / 4 > 0:
    L += M / 4
    c += M % 4
else:
    c += L

if L / 10 > 0:
    c += L % 10
print c