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

r = [[] for _ in range(n)]
s = [[] for _ in range(n)]
x1 = [0] * n
c1 = [0] * n
x2 = [0] * n
c2 = [16000000] * n
cost = {}

def ky(a, b):
    return a * 100000 + b

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

tmp1 = [0]
while len(tmp1) > 0:
    tmp2 = []
    for a in tmp1:
        ca = c1[a]
        for b in r[a]:
            c1[b] = max(c1[b], ca + cost[ky(a, b)])
            x1[b] += 1
            if x1[b] == len(s[b]):
                tmp2.append(b)
    tmp1 = tmp2

c2[n - 1] = c1[n - 1]
tmp1 = [n - 1]
while len(tmp1) > 0:
    tmp2 = []
    for b in tmp1:
        cb = c2[b]
        for a in s[b]:
            c2[a] = min(c2[a], cb - cost[ky(a, b)])
            x2[a] += 1
            if x2[a] == len(r[a]):
                tmp2.append(a)
    tmp1 = tmp2

p = 0
for i in range(n):
    if c1[i] != c2[i]:
        p += 1

print('{0} {1}/{2}'.format(c1[n - 1], p, n))