#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; using namespace atcoder; typedef long long ll; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--) #define repk(i, k, n) for (int i = k; i < (int)(n); i++) #define all(v) v.begin(), v.end() #define mod1 1000000007 #define mod2 998244353 #define mod3 100000007 #define vi vector #define vs vector #define vc vector #define vl vector #define vb vector #define vvi vector> #define vvc vector> #define vvl vector> #define vvb vector> #define vvvi vector>> #define vvvl vector>> #define pii pair #define pil pair #define pli pair #define pll pair #define vpii vector> #define vpll vector> #define vvpii vector>> #define vvpll vector>> template void debug(T e) { cerr << e << endl; } template void debug(vector &v) { rep(i, v.size()) { cerr << v[i] << " "; } cerr << endl; } template void debug(vector> &v) { rep(i, v.size()) { rep(j, v[i].size()) { cerr << v[i][j] << " "; } cerr << endl; } } template void debug(vector> &v) { rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; } } template void debug(set &st) { for (auto itr = st.begin(); itr != st.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template void debug(multiset &ms) { for (auto itr = ms.begin(); itr != ms.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template void debug(map &mp) { for (auto itr = mp.begin(); itr != mp.end(); itr++) { cerr << itr->first << " " << itr->second << endl; } } void debug_out() { cerr << endl; } template void debug_out(Head H, Tail... T) { cerr << H << " "; debug_out(T...); } using mint = modint998244353; void debug_mint1(vector &vec) { for (int i = 0; i < vec.size(); i++) { cerr << vec[i].val() << " "; } cerr << endl; } void debug_mint2(vector> &vec) { for (int i = 0; i < vec.size(); i++) { for (int j = 0; j < vec[i].size(); j++) { cerr << vec[i][j].val() << " "; } cerr << endl; } } const ll INF = 10000000000000023LL; int main() { ll N, M, C; cin >> N >> M >> C; vector u(M); vector v(M); vector r(M); vector w(M); rep(i, M){ cin >> u[i] >> v[i] >> r[i] >> w[i]; u[i]--; v[i]--; } vector> ids(N, vector(0)); for (ll i = 0; i < M; i++){ ids[u[i]].push_back(i); ids[v[i]].push_back(i); } // ダイクストラ法でやる for (ll i = 1; i <= C; i++){ vector dist(N, -INF); dist[0] = i; vector chosen(N, false); for (ll j = 0; j < N; j++){ ll max_dist = -INF; ll max_id = -1; for (ll k = 0; k < N; k++){ if (!chosen[k]){ if (max_dist < dist[k]){ max_id = k; max_dist = dist[k]; } } } if (max_id == -1) break; chosen[max_id] = true; for (ll k = 0; k < ids[max_id].size(); k++){ ll id = ids[max_id][k]; ll cost = dist[max_id] / r[id] + w[id]; ll to; if (u[id] == max_id) to = v[id]; if (v[id] == max_id) to = u[id]; if (cost <= dist[max_id]){ dist[to] = max(dist[to], dist[max_id] - cost); } } } // debug(dist); if (dist[N - 1] < 0) cout << -1 << endl; else cout << dist[N - 1] << endl; } }