from math import floor
L = int(input())
M = int(input())
N = int(input())
m = floor(N / 25)
nn = N - 25 * m
l = floor((M + m) / 4)
mm = M + m - 4 * l
kk = floor((L + l) / 10)
ll = L + l - 10 * kk
print(ll + mm + nn)