結果
問題 |
No.1065 電柱 / Pole (Easy)
|
ユーザー |
|
提出日時 | 2020-06-11 04:26:45 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 857 ms / 2,000 ms |
コード長 | 3,768 bytes |
コンパイル時間 | 2,302 ms |
コンパイル使用メモリ | 80,280 KB |
実行使用メモリ | 90,092 KB |
最終ジャッジ日時 | 2024-06-24 01:50:23 |
合計ジャッジ時間 | 25,422 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 46 |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; import java.util.PriorityQueue; public class Main { public static void main(String[] args) { new Main().run(); } final long MOD=998244353; class State implements Comparable<State>{ int v; double d; public State(int v,double d) { this.v=v; this.d=d; } @Override public int compareTo(State o) { return Double.compare(d, o.d); } } double dist(double x0,double y0,double x1,double y1) { double dx=x0-x1; double dy=y0-y1; return Math.sqrt(dx*dx+dy*dy); } void run() { FastScanner sc=new FastScanner(); int N=sc.nextInt(); int M=sc.nextInt(); int X=sc.nextInt()-1; int Y=sc.nextInt()-1; double[] p=new double[N]; double[] q=new double[N]; for (int i=0;i<N;++i) { p[i]=sc.nextDouble(); q[i]=sc.nextDouble(); } ArrayList<Integer>[] g=new ArrayList[N]; for (int i=0;i<N;++i) g[i]=new ArrayList<>(); for (int i=0;i<M;++i) { int a=sc.nextInt()-1; int b=sc.nextInt()-1; g[a].add(b); g[b].add(a); } double[] dist=new double[N]; Arrays.fill(dist, Double.MAX_VALUE/3); dist[X]=0; PriorityQueue<State> pq=new PriorityQueue<>(); pq.add(new State(X,0)); while (!pq.isEmpty()) { State s=pq.poll(); if (dist[s.v]<s.d) continue; for (int dst:g[s.v]) { if (dist[dst]>dist[s.v]+dist(p[s.v],q[s.v],p[dst],q[dst])) { dist[dst]=dist[s.v]+dist(p[s.v],q[s.v],p[dst],q[dst]); pq.add(new State(dst, dist[dst])); } } } System.out.println(dist[Y]); } void tr(Object...o) {System.out.println(Arrays.deepToString(o));} } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; }else{ ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;} private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();} public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while(isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next());} }