結果

問題 No.168 ものさし
ユーザー tenten
提出日時 2020-10-08 09:58:28
言語 Java
(openjdk 23)
結果
AC  
実行時間 573 ms / 2,000 ms
コード長 1,787 bytes
コンパイル時間 2,211 ms
コンパイル使用メモリ 79,288 KB
実行使用メモリ 59,684 KB
最終ジャッジ日時 2024-07-20 05:46:44
合計ジャッジ時間 9,546 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 19
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import java.util.*;
public class Main {
public static void main (String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
Point[] points = new Point[n];
for (int i = 0; i < n; i++) {
points[i] = new Point(sc.nextInt(), sc.nextInt());
}
PriorityQueue<Path> queue = new PriorityQueue<>();
queue.add(new Path(0,0));
long[] costs = new long[n];
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 (int i = 0; i < n; i++) {
if (costs[i] == Long.MAX_VALUE) {
queue.add(new Path(i, Math.max(p.value, points[p.idx].getDistance(points[i]))));
}
}
}
long left = 0;
long right = Integer.MAX_VALUE;
while (right - left > 1) {
long m = (left + right) / 2;
if (m * m >= costs[n - 1]) {
right = m;
} else {
left = m;
}
}
long ans = (right + 9) / 10 * 10;
System.out.println(ans);
}
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) {
if (value == another.value) {
return 0;
} else if (value > another.value) {
return 1;
} else {
return -1;
}
}
}
static class Point {
int x;
int y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public long getDistance(Point another) {
return (long)(x - another.x) * (x - another.x) + (long)(y - another.y) * (y - another.y);
}
}
}
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