L = int(input())
M = int(input())
N = int(input())
if N >= 25:
  q, mod = divmod(N, 25)
  M += q
  N = mod

if M >= 4:
  q, mod = divmod(M, 4)
  L += q
  M = mod

if L >= 10:
  q, mod = divmod(L, 10)
  L = mod

print(L + M + N)