結果
| 問題 | No.1265 Balloon Survival |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2022-08-04 16:52:31 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 535 ms / 2,000 ms |
| コード長 | 2,644 bytes |
| 記録 | |
| コンパイル時間 | 2,379 ms |
| コンパイル使用メモリ | 79,088 KB |
| 実行使用メモリ | 69,704 KB |
| 最終ジャッジ日時 | 2024-09-14 13:32:22 |
| 合計ジャッジ時間 | 11,741 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 32 |
ソースコード
import java.io.*;
import java.util.*;
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());
}
PriorityQueue<Path> queue = new PriorityQueue<>();
for (int i = 0; i < n - 1; i++) {
for (int j = i + 1; j < n; j++) {
queue.add(new Path(i, j, points[i].getDistance(points[j])));
}
}
HashSet<Integer> removed = new HashSet<>();
int count = 0;
while (queue.size() > 0) {
Path p = queue.poll();
if (removed.contains(p.left) || removed.contains(p.right)) {
continue;
}
if (p.left == 0) {
removed.add(p.right);
count++;
continue;
}
removed.add(p.left);
removed.add(p.right);
}
System.out.println(count);
}
static class Path implements Comparable<Path> {
int left;
int right;
long value;
public Path(int left, int right, long value) {
this.left = left;
this.right = right;
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 p) {
return (x - p.x) * (x - p.x) + (y - p.y) * (y - p.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 next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten