import sys

inf = 10**9 + 1

def solve():
    def memorec1(v, saitan):
        if saitan[v] >= 0:
            return saitan[v]
        if v == 0:
            saitan[0] = 0
            return 0

        res = 0

        for u, c in adj1[v]:
            res = max(res, memorec1(u, saitan) + c)

        saitan[v] = res
        return res

    def memorec2(v, saiti):
        if saiti[v] >= 0:
            return saiti[v]
        if v == N - 1:
            saiti[N - 1] = saitan[N - 1]
            return saiti[N - 1]

        res = inf

        for u, c in adj2[v]:
            res = min(res, memorec2(u, saiti) - c)

        saiti[v] = res
        return res

    N, M = map(int, input().split())
    saitan = [-1] * N
    saiti = [-1] * N
    adj1 = [[] for i in range(N)]
    adj2 = [[] for i in range(N)]

    for i in range(M):
        a, b, c = map(int, sys.stdin.readline().split())
        adj1[b].append((a, c))
        adj2[a].append((b, c))

    memorec1(N - 1, saitan)
    # print(*saitan, file=sys.stderr)

    memorec2(0, saiti)
    # print(*saiti, file=sys.stderr)

    cnt = 0

    for u in range(N):
        if saitan[u] == saiti[u]:
            cnt += 1

    t = saitan[N - 1]
    p = N - cnt

    print('{} {}/{}'.format(t, p, N))

if __name__ == '__main__':
    solve()