結果
| 問題 |
No.2354 Poor Sight in Winter
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-12-12 10:49:24 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 417 ms / 2,000 ms |
| コード長 | 3,556 bytes |
| コンパイル時間 | 2,513 ms |
| コンパイル使用メモリ | 91,868 KB |
| 実行使用メモリ | 67,096 KB |
| 最終ジャッジ日時 | 2024-09-27 04:53:46 |
| 合計ジャッジ時間 | 7,831 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int k = sc.nextInt();
Point[] points = new Point[n + 2];
int[][] distances = new int[n + 2][n + 2];
for (int i = 0; i < n + 2; i++) {
points[i] = new Point(sc.nextInt(), sc.nextInt());
for (int j = 0; j < i; j++) {
int d = points[i].getDistance(points[j]);
distances[i][j] = d;
distances[j][i] = d;
}
}
int left = 0;
int right = Integer.MAX_VALUE / 2;
PriorityQueue<Path> queue = new PriorityQueue<>();
int[] costs = new int[n + 2];
while (right - left > 1) {
int m = (left + right) / 2;
queue.clear();
queue.add(new Path(0, 0));
Arrays.fill(costs, Integer.MAX_VALUE);
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[p.idx] <= p.value) {
continue;
}
costs[p.idx] = p.value;
if (p.idx == 1) {
break;
}
for (int i = 0; i < n + 2; i++) {
if (costs[i] == Integer.MAX_VALUE) {
queue.add(new Path(i, p.value + (distances[i][p.idx] + m - 1) / m - 1));
}
}
}
if (costs[1] <= k) {
right = m;
} else {
left = m;
}
}
System.out.println(right);
}
static class Path implements Comparable<Path> {
int idx;
int value;
public Path(int idx, int value) {
this.idx = idx;
this.value = value;
}
public int compareTo(Path another) {
return value - another.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 Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten