結果
問題 | No.1320 Two Type Min Cost Cycle |
ユーザー |
|
提出日時 | 2020-12-17 12:36:57 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 196 ms / 2,000 ms |
コード長 | 2,865 bytes |
コンパイル時間 | 2,338 ms |
コンパイル使用メモリ | 207,616 KB |
最終ジャッジ日時 | 2025-01-17 02:24:28 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 57 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i, n) for(int i = 0; i < n; i++)#define rep2(i, x, n) for(int i = x; i <= n; i++)#define rep3(i, x, n) for(int i = x; i >= n; i--)#define each(e, v) for(auto &e: v)#define pb push_back#define eb emplace_back#define all(x) x.begin(), x.end()#define rall(x) x.rbegin(), x.rend()#define sz(x) (int)x.size()using ll = long long;using pii = pair<int, int>;using pil = pair<int, ll>;using pli = pair<ll, int>;using pll = pair<ll, ll>;const int MOD = 1000000007;//const int MOD = 998244353;const int inf = (1<<30)-1;const ll INF = (1LL<<60)-1;template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;};template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;};struct io_setup{io_setup(){ios_base::sync_with_stdio(false);cin.tie(NULL);cout << fixed << setprecision(15);}} io_setup;template<typename T>struct Weighted_Graph{struct edge{int to; T cost; int id;edge(int to, T cost, int id) : to(to), cost(cost), id(id) {}};vector<vector<edge>> es;vector<T> d;vector<int> pre_v;vector<int> keep;int ng;const T INF_T;const int n;Weighted_Graph(int n) : INF_T(numeric_limits<T>::max()>>1), n(n){es.resize(n), d.resize(n), pre_v.resize(n);}void add_edge(int from, int to, T cost, int id, bool directed = false){es[from].eb(to, cost, id);if(!directed) es[to].eb(from, cost, id);}T dijkstra(int s, int t = 0){fill(all(d), INF_T);using P = pair<T, int>;priority_queue<P, vector<P>, greater<P> > que;que.emplace(d[s] = 0, s);while(!que.empty()){auto [p, i] = que.top(); que.pop();if(p > d[i]) continue;each(e, es[i]){if(e.id == ng) continue;if(chmin(d[e.to], d[i]+e.cost)){pre_v[e.to] = i, que.emplace(d[e.to], e.to);}}}return d[t];}vector<int> shortest_path(int s, int t){keep.clear();if(dijkstra(s, t) == INF_T) return keep;for(int now = t; now != s; now = pre_v[now]) keep.pb(now);keep.pb(s), reverse(all(keep));return keep;}T query(int u, int v, int id){ng = id;return dijkstra(u, v);}};int main(){int T;cin >> T;int N, M;cin >> N >> M;vector<int> u(M), v(M);vector<ll> c(M);Weighted_Graph<ll> G(N);rep(i, M){cin >> u[i] >> v[i] >> c[i];u[i]--, v[i]--;G.add_edge(u[i], v[i], c[i], i, T);}ll ans = INF;rep(i, M){chmin(ans, c[i]+G.query(v[i], u[i], i));}cout << (ans >= INF? -1 : ans) << '\n';}