n, m = map(int, input().split())

r = [[] for _ in range(n)]
s = [[] for _ in range(n)]
t1 = [[0, 0] for _ in range(n)]
t2 = [[0, 16000000] for _ in range(n)]

for _ in range(m):
    a, b, c = map(int, input().split())
    r[a].append([b, c])
    s[b].append([a, c])

tmp1 = set()
tmp1.add(0)
while len(tmp1) > 0:
    tmp2 = set()
    for a in tmp1:
        for b, c in r[a]:
            t1[b][1] = max(t1[b][1], t1[a][1] + c)
            t1[b][0] += 1
            if t1[b][0] == len(s[b]):
                tmp2.add(b)
    tmp1 = tmp2

t2[n - 1][1] = t1[n - 1][1]
tmp1 = set()
tmp1.add(n - 1)
while len(tmp1) > 0:
    tmp2 = set()
    for b in tmp1:
        for a, c in s[b]:
            t2[a][1] = min(t2[a][1], t2[b][1] - c)
            t2[a][0] += 1
            if t2[a][0] == len(r[a]):
                tmp2.add(a)
    tmp1 = tmp2

p = 0
for i in range(n):
    if t1[i][1] != t2[i][1]:
        p += 1

print('{0} {1}/{2}'.format(t1[n - 1][1], p, n))