結果
問題 | No.2376 障害物競プロ |
ユーザー |
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提出日時 | 2023-07-08 15:54:57 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 986 ms / 4,000 ms |
コード長 | 4,357 bytes |
コンパイル時間 | 2,261 ms |
コンパイル使用メモリ | 153,580 KB |
実行使用メモリ | 6,400 KB |
最終ジャッジ日時 | 2024-07-22 11:20:24 |
合計ジャッジ時間 | 84,830 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 40 |
ソースコード
#include<iostream>#include<vector>#include<string>#include<algorithm>#include<set>#include<queue>#include<cassert>#include<cmath>#include<iomanip>using namespace std;using ll = long long;using dat = pair<ll,ll>;template< typename T >struct edge{int from,to;T cost;edge(int from,int to, T cost):from(from),to(to),cost(cost){};edge &operator=(const int& x){to = x;return *this;}};template< typename T >struct graph{int n;vector<vector<edge<T>>> e;graph(int n):n(n),e(n){}void add_edge(int from,int to,T cost){e[from].emplace_back(from,to,cost);}vector<edge<T>> &operator[](int i) {return e[i];}};template< typename T >vector<vector<T>> warshallfloyd(graph<T>& g,T const inf = (T)1e9){int n = g.n;vector<vector<T>> dist(n,vector<T>(n,inf));for(int i = 0;i<n;i++){dist[i][i] = 0;}for(int i = 0;i<n;i++){for(edge<T> e:g[i]){dist[i][e.to] = e.cost;}}for(int k = 0;k<n;k++){for(int i = 0;i<n;i++){for(int j = 0;j<n;j++){dist[i][j] = min(dist[i][j],dist[i][k]+dist[k][j]);}}}return dist;}int ccw(dat a,dat b,dat c){ll da = b.first - a.first;ll db = b.second - a.second;ll dc = c.first - a.first;ll dd = c.second - a.second;if(da*dd-db*dc>0) return 1;if(da*dd-db*dc<0) return -1;if(da*db+dc*dd<0) return 2;if(da*da+db*db<dc*dc+dd*dd) return -2;return 0;}bool isok(dat a,dat b,dat c,dat d){if(ccw(a,b,c)*ccw(a,b,d)<0&&ccw(c,d,a)*ccw(c,d,b)<0) return 0;else return 1;}int main(){int n,m;cin>>n>>m;vector<vector<ll>> x(2,vector<ll>(n)),y(2,vector<ll>(n));for(int i = 0;i<n;i++) for(int j = 0;j<2;j++) cin>>x[j][i]>>y[j][i];vector<pair<ll,ll>> d;for(int i = 0;i<n;i++){for(int j = 0;j<2;j++){d.push_back(make_pair(x[j][i],y[j][i]));}}set<pair<dat,dat>> s;sort(d.begin(),d.end());for(int i = 0;i<n;i++){dat now = {x[0][i],y[0][i]};dat nxt = {x[1][i],y[1][i]};s.insert(make_pair(now,nxt));s.insert(make_pair(nxt,now));}int al = d.size();graph<double> g(al);for(int i = 0;i<al;i++){for(int j = i + 1;j<al;j++){dat a = d[i];dat b = d[j];if(s.count(make_pair(a,b))) continue;if(s.count(make_pair(b,a))) continue;bool ok = true;for(int k = 0;k<n;k++){dat c = {x[0][k],y[0][k]};dat dd = {x[1][k],y[1][k]};if(c==a||c==b||dd==a||dd==b) continue;if(isok(a,b,c,dd)) continue;ok = false;break;}if(!ok) continue;int ni = lower_bound(d.begin(),d.end(),a) - d.begin();int nj = lower_bound(d.begin(),d.end(),b) - d.begin();ll dx = a.first - b.first;ll dy = a.second - b.second;double now = sqrt(dx*dx+dy*dy);g.add_edge(ni,nj,now);g.add_edge(nj,ni,now);}}for(int i = 0;i<n;i++){dat a = {x[0][i],y[0][i]};dat b = {x[1][i],y[1][i]};bool ok = true;for(int j = 0;j<n;j++){if(i==j) continue;dat c = {x[0][j],y[0][j]};dat dd = {x[1][j],y[1][j]};if(c==a||c==b||dd==a||dd==b) continue;if(isok(a,b,c,dd)) continue;ok = false;break;}if(!ok) continue;int ni = lower_bound(d.begin(),d.end(),a) - d.begin();int nj = lower_bound(d.begin(),d.end(),b) - d.begin();ll dx = a.first - b.first;ll dy = a.second - b.second;double now = sqrt(dx*dx+dy*dy);g.add_edge(ni,nj,now);g.add_edge(nj,ni,now);}auto di = warshallfloyd<double>(g);cout<<fixed<<setprecision(30);while(m--){int i,j,k,l;cin>>i>>j>>k>>l;i--;j--;k--;l--;dat a = {x[j][i],y[j][i]};dat b = {x[l][k],y[l][k]};int ni = lower_bound(d.begin(),d.end(),a) - d.begin();int nj = lower_bound(d.begin(),d.end(),b) - d.begin();cout<<di[ni][nj]<<endl;}}