from collections import deque

def dfs(u,cp):
    cp[u] = True
    for v,c in re[u]:
        if not cp[v] and t[v] + c == t[u]:
            dfs(v,cp)

n,m = map(int,input().split(' '))
e = [[] for i in range(n)]
re = [[] for i in range(n)]
di = [0] * n
for i in range(m):
    a,b,c = map(int,input().split(' '))
    e[a].append((b,c))
    re[b].append((a,c))
    di[b] += 1
q = deque()
for i in range(n):
    if di[i] == 0:
        q.append(i)
t = [0] * n
while len(q):
    u = q.popleft()
    for v,c in e[u]:
        t[v] = max(t[v],t[u] + c)
        di[v] -= 1
        if di[v] == 0:
            q.append(v)
cp = [False] * n
dfs(n-1,cp)
print(t[n-1],"%d/%d" % (n-sum(cp),n))