結果
問題 | No.2695 Warp Zone |
ユーザー |
👑 |
提出日時 | 2024-03-22 21:56:27 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,769 ms / 2,000 ms |
コード長 | 3,530 bytes |
コンパイル時間 | 4,306 ms |
コンパイル使用メモリ | 286,204 KB |
実行使用メモリ | 226,772 KB |
最終ジャッジ日時 | 2024-09-30 11:27:25 |
合計ジャッジ時間 | 20,967 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 24 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>#define rep(i,n) for(int i=0;i<n;i++)using namespace std;using namespace atcoder;typedef long long ll;typedef vector<int> vi;typedef vector<long long> vl;typedef vector<vector<int>> vvi;typedef vector<vector<long long>> vvl;typedef long double ld;typedef pair<int, int> P;ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); returnos;}template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : "");return os;}template<typename T> void chmin(T& a, T b){a = min(a, b);}template<typename T> void chmax(T& a, T b){a = max(a, b);}template<typename T>struct Edge_Dijkstra{int from, to;T cost;Edge_Dijkstra(int from, int to, T cost) : from(from), to(to), cost(cost) {};};const long long INF = 1001001001001001;template<typename T>struct Dijkstra{int n, m;vector<bool> initialized;vector<Edge_Dijkstra<T>> E;vector<vector<int>> G;map<int, vector<T>> dist;map<int, vector<int>> idx;Dijkstra(int _n) : n(_n), m(0), initialized(n, false), G(n){}void add_edge(int from, int to, T cost){Edge_Dijkstra e(from, to, cost);E.push_back(e);G[from].emplace_back(m);m++;}void calc(int s){initialized[s] = true;dist[s] = vector<T>(n, INF);idx[s] = vector<int>(n, -1);priority_queue<tuple<T, int, int>, vector<tuple<T, int, int>>, greater<tuple<T, int, int>>> pq;pq.emplace(0, s, -1);while(pq.size()){auto [cost, from, index] = pq.top(); pq.pop();if(dist[s][from] <= cost) continue;dist[s][from] = cost;idx[s][from] = index;for(int index : G[from]){int to = E[index].to;T cost_plus = E[index].cost;if(dist[s][to] <= cost + cost_plus) continue;pq.emplace(cost + cost_plus, to, index);}}}int farthest(int s){if(!initialized[s]) calc(s);int idx = 0;rep(i, n) if(dist[s][i] > dist[s][idx]) idx = i;return idx;}T get_dist(int s, int t){if(!initialized[s]) calc(s);return dist[s][t];}vi restore(int s, int t){if(!initialized[s]) calc(s);if(dist[s][t] == INF) return vi(0);vi res;while(idx[s][t] != -1){auto e = E[idx[s][t]];res.push_back(idx[s][t]);t = e.from;}reverse(res.begin(), res.end());return res;}};int main(){int h, w, n;cin >> h >> w >> n;int m = 2 * n + 2;vector<long long> y(2 * n + 2), x(2 * n + 2);int sv = 2 * n;int tv = 2 * n + 1;rep(i, n){cin >> y[2 * i] >> x[2 * i];cin >> y[2 * i + 1] >> x[2 * i + 1];}y[sv] = 1; x[sv] = 1;y[tv] = h; x[tv] = w;Dijkstra<long long> graph(m);rep(i, m){rep(j, m){graph.add_edge(i, j, abs(x[i] - x[j]) + abs(y[i] - y[j]));graph.add_edge(j, i, abs(x[i] - x[j]) + abs(y[i] - y[j]));}}rep(i, n){graph.add_edge(2 * i, 2 * i + 1, 1LL);}cout << graph.get_dist(sv, tv) << "\n";return 0;}