L = int(input())
M = int(input())
N = int(input())
def div(a, b):
    c = a // b
    d = a % b
    return(c, d)
n1, n2 = div(N, 25)
m1, m2 = div(M+n1, 4)
l1, l2 = div(L+m1, 10)
print(n2+m2+l2)