import sys


def resolve(in_):
    L = int(next(in_))
    M = int(next(in_))
    N = int(next(in_))

    a, N = divmod(N, 25)
    M += a
    a, M = divmod(M, 4)
    L += a
    L %= 10
    ans = L + M + N
    return ans


def main():
    ans = resolve(sys.stdin.buffer)
    print(ans)


if __name__ == '__main__':
    main()