# include # include #include # include #include #include #include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include # include #include #include #include #include #include #include //#include using namespace std; using LL = long long; using ULL = unsigned long long; const long long MOD = 1000000000 + 7;//1000000000 + 7 998244353 924844033 1000000000 + 9; constexpr long long INF = 1LL << 60;//numeric_limits::max(); const double PI = acos(-1); #define fir first #define sec second #define thi third #define debug(x) cerr<<#x<<": "< Pll; typedef pair Dll; typedef pair> Ppll; typedef pair>> Pbll; typedef pair>> Pvll; typedef pair Vec2; struct Tll { LL first, second, third; }; struct Fll { LL first, second, third, fourth; }; typedef pair Ptll; #define rep(i,rept) for(LL i=0;i=0;i--) void YN(bool f) { if (f) cout << "YES" << endl; else cout << "NO" << endl; } void yn(bool f) { if (f) cout << "Yes" << endl; else cout << "No" << endl; } struct Edge { LL to, cost; }; struct edge { LL from, to, cost; }; vector>g,rev; vectored; vectorpv; setst; mapma; int di[4][2] = { { 0,1 },{ 1,0 },{ 0,-1 },{ -1,0 } }; string str, ss; bool f[200000]; LL n, m, s, t, h, w, k, q, p, ans, sum, cnt,dp[200000]; vector tsort(vector>g) { int n = g.size(); enum { YET, VISITED, DONE }; vector res, flg(g.size(), YET); static const function dfs = [&](int v) { flg[v] = VISITED; for (auto &e : g[v]) { int w = e.to; if (flg[w] != DONE && (flg[w] == VISITED || !dfs(w))) return false; } flg[v] = DONE; res.push_back(v); return true; }; for (int i = 0; i < n; ++i) if (flg[i] == YET && !dfs(i)) return{}; reverse(res.begin(), res.end()); return res; } int main() { cin >> n >> m; g.resize(n); rev.resize(n); rep(i, m) { LL x, y, z; cin >> x >> y >> z; g[x].push_back(Edge{ y,z }); rev[y].push_back(Edge{ x,z }); } vectorv = tsort(g); rep(i, v.size()) { int cur = v[i]; rep(j, g[cur].size()) { int nex = g[cur][j].to, cost = g[cur][j].cost; if (dp[nex] < dp[cur] + cost) { dp[nex] = dp[cur] + cost; } } } Rrep(i, v.size()) { int cur = v[i]; rep(j, rev[cur].size()) { int nex = rev[cur][j].to, cost = rev[cur][j].cost; if (dp[nex]+ cost != dp[cur] ) { f[nex] = 1; } } } rep(i, n)if (f[i])cnt++; cout << dp[n - 1] << " " << cnt << "/" << n << endl; return 0; }