#include <bits/stdc++.h>
using namespace std;

#define _p(...) (void)printf(__VA_ARGS__)
#define forr(x,arr) for(auto&& x:arr)
#define _overload3(_1,_2,_3,name,...) name
#define _rep2(i,n) _rep3(i,0,n)
#define _rep3(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload3(__VA_ARGS__,_rep3,_rep2,)(__VA_ARGS__)
#define _rrep2(i,n) _rrep3(i,0,n)
#define _rrep3(i,a,b) for(int i=int(b)-1;i>=int(a);i--)
#define rrep(...) _overload3(__VA_ARGS__,_rrep3,_rrep2,)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
#define bit(n) (1LL<<(n))
#define sz(x) ((int)(x).size())
#define fst first
#define snd second
using ll=long long;using pii=pair<int,int>;
using vb=vector<bool>;using vs=vector<string>;
using vi=vector<int>;using vvi=vector<vi>;using vvvi=vector<vvi>;
using vl=vector<ll>;using vvl=vector<vl>;using vvvl=vector<vvl>;
using vd=vector<double>;using vvd=vector<vd>;using vvvd=vector<vvd>;
using vpii=vector<pii>;using vvpii=vector<vpii>;using vvvpii=vector<vvpii>;
template<typename T>T read(){T t;cin>>t;return t;}
template<class T,class U>ostream&operator<<(ostream&o,const pair<T,U>&p){o<<'('<<p.fst<<", "<<p.snd<<')';return o;}

vector<int> topological_sort(vector<vector<pii> > &E) {
  int N = E.size();
  vector<bool> used(N);
  vector<int> indeg(N);
  for (auto &es : E) for (pii &vc : es) indeg[vc.fst]++;
  vector<int> ret;
  ret.reserve(N);
  queue<int> q;
  for (int i = 0; i < N; i++) {
    if (indeg[i] == 0 && !used[i]) {
      q.push(i);
      used[i] = 1;
      while (!q.empty()) {
        int cur = q.front(); q.pop();
        ret.push_back(cur);
        for (pii &nexc : E[cur]) {
          int nex = nexc.fst;
          indeg[nex]--;
          if (indeg[nex] == 0 && !used[nex]) {
            used[nex] = 1;
            q.push(nex);
          }
        }
      }
    }
  }
  return *max_element(indeg.begin(), indeg.end()) == 0 ? ret : vector<int>();
}

void Main() {
  int n = read<int>();
  int m = read<int>();
  vvpii E(n), F(n);;
  rep(i, m) {
    int u = read<int>();
    int v = read<int>();
    int w = read<int>();
    E[u].emplace_back(v, w);
    F[v].emplace_back(u, w);
  }

  vi V = topological_sort(E);

  const int inf = 1e9;

  vi D(n, -inf);
  D[V[0]] = 0;

  forr(v, V) {
    forr(uc, E[v]) {
      int u = uc.fst;
      int c = uc.snd;
      D[u] = max(D[u], D[v] + c);
    }
  }

  int T = D[V[n-1]];

  vb C(n);
  C[V[n-1]] = 1;

  reverse(all(V));
  forr(v, V) {
    if (!C[v]) continue;
    forr(uc, F[v]) {
      int u = uc.fst;
      int c = uc.snd;
      if (D[u] + c == D[v]) {
        C[u] = 1;
      }
    }
  }

  int P = n;
  forr(c, C) P -= c;

  _p("%d %d/%d\n", T, P, n);

}
int main() { cin.tie(nullptr); ios::sync_with_stdio(false); Main(); return 0; }