結果
| 問題 |
No.168 ものさし
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2021-11-10 15:41:55 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 423 ms / 2,000 ms |
| コード長 | 2,892 bytes |
| コンパイル時間 | 2,617 ms |
| コンパイル使用メモリ | 78,756 KB |
| 実行使用メモリ | 70,732 KB |
| 最終ジャッジ日時 | 2024-11-21 03:29:31 |
| 合計ジャッジ時間 | 7,472 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
ソースコード
import java.util.*;
import java.io.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
Point[] points = new Point[n];
for (int i = 0; i < n; i++) {
points[i] = new Point(sc.nextInt(), sc.nextInt());
}
long[] costs = new long[n];
Arrays.fill(costs, Long.MAX_VALUE);
PriorityQueue<Path> queue = new PriorityQueue<>();
queue.add(new Path(0, 0));
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) {
continue;
}
queue.add(new Path(i, Math.max(p.value, points[p.idx].getDistance(points[i]))));
}
}
long left = 0;
long right = Integer.MAX_VALUE / 10;
while (right - left > 1) {
long m = (left + right) / 2;
if (m * m * 100 < costs[n - 1]) {
left = m;
} else {
right = m;
}
}
System.out.println(right * 10);
}
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 {
long x;
long y;
public Point(long x, long y) {
this.x = x;
this.y = y;
}
public long getDistance(Point another) {
return (x - another.x) * (x - another.x) + (y - another.y) * (y - another.y);
}
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
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 String nextLine() throws Exception {
return br.readLine();
}
public String next() throws Exception {
if (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten