結果
| 問題 |
No.2695 Warp Zone
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2024-04-11 16:01:22 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,147 ms / 2,000 ms |
| コード長 | 3,338 bytes |
| コンパイル時間 | 4,197 ms |
| コンパイル使用メモリ | 85,600 KB |
| 実行使用メモリ | 114,336 KB |
| 最終ジャッジ日時 | 2024-10-02 21:38:44 |
| 合計ジャッジ時間 | 17,377 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 24 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int h = sc.nextInt();
int w = sc.nextInt();
int n = sc.nextInt();
Point[] points = new Point[n * 2 + 2];
points[0] = new Point(1, 1);
points[1] = new Point(h, w);
for (int i = 2; i < n * 2 + 2; i++) {
points[i] = new Point(sc.nextInt(), sc.nextInt());
}
List<List<Path>> graph = new ArrayList<>();
for (int i = 0; i < n * 2 + 2; i++) {
graph.add(new ArrayList<>());
}
for (int i = 1; i <= n; i++) {
graph.get(i * 2).add(new Path(i * 2 + 1, 1));
for (int j = 1; j <= n; j++) {
graph.get(i * 2 + 1).add(new Path(j * 2, points[i * 2 + 1].getDistance(points[j * 2])));
}
graph.get(0).add(new Path(i * 2, points[0].getDistance(points[i * 2])));
graph.get(i * 2 + 1).add(new Path(1, points[1].getDistance(points[i * 2 + 1])));
}
graph.get(0).add(new Path(1, points[0].getDistance(points[1])));
PriorityQueue<Path> queue = new PriorityQueue<>();
queue.add(new Path(0, 0));
long[] costs = new long[n * 2 + 2];
Arrays.fill(costs, Long.MAX_VALUE);
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[p.idx] <= p.value) {
continue;
}
costs[p.idx] = p.value;
for (Path x : graph.get(p.idx)) {
queue.add(new Path(x.idx, p.value + x.value));
}
}
System.out.println(costs[1]);
}
static class Path implements Comparable<Path> {
int idx;
long value;
public Path(int idx, long value) {
this.idx = idx;
this.value = value;
}
public int compareTo(Path another) {
return Long.compare(value, another.value);
}
public String toString() {
return idx + ":" + value;
}
}
static class Point {
int x;
int y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public int getDistance(Point p) {
return Math.abs(x - p.x) + Math.abs(y - p.y);
}
}
}
class Scanner {
BufferedReader br;
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() {
try {
br = new BufferedReader(new InputStreamReader(System.in));
} catch (Exception e) {
}
}
public int nextInt() {
return Integer.parseInt(next());
}
public long nextLong() {
return Long.parseLong(next());
}
public double nextDouble() {
return Double.parseDouble(next());
}
public String next() {
try {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
return st.nextToken();
}
}
}
tenten