L, M, N = int(input()), int(input()), int(input())
if N >= 25:
    a = N // 25
    M += a
    N -= a * 25
    
if M >= 4:
    b = M // 4
    L += b
    M -= b * 4


if L >= 10:
    c = L // 10
    L -= c * 10

print(sum([L, M, N]))