def f(l, m, n):
    q, r = divmod(n, 25)
    m += q
    n = r

    q, r = divmod(m, 4)
    l += q
    m = r

    r = l % 10
    l = r

    return l+m+n

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

print(f(L, M, N))