結果
| 問題 |
No.1065 電柱 / Pole (Easy)
|
| コンテスト | |
| 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 |
(要ログイン)
| 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());}
}