L = int(input())
M = int(input())
N = int(input())

q_1,mod_1 = divmod(L,25)
M = M + q_1
q_2,mod_2 = divmod(M,4)
N = N + q_2
q_3,mod_3 = divmod(N,10)

print(mod_1 + mod_2 + mod_3)