結果
問題 |
No.1265 Balloon Survival
|
ユーザー |
![]() |
提出日時 | 2023-08-03 08:44:05 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 576 ms / 2,000 ms |
コード長 | 3,245 bytes |
コンパイル時間 | 2,767 ms |
コンパイル使用メモリ | 84,688 KB |
実行使用メモリ | 60,020 KB |
最終ジャッジ日時 | 2024-10-13 06:15:32 |
合計ジャッジ時間 | 10,841 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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.*; import java.util.stream.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); Baloon[] baloons = new Baloon[n]; PriorityQueue<Distance> distatnces = new PriorityQueue<>(); for (int i = 0; i < n; i++) { baloons[i] = new Baloon(sc.nextInt(), sc.nextInt()); for (int j = 0; j < i; j++) { distatnces.add(new Distance(i, j, baloons[i].getDestance(baloons[j]))); } } boolean[] removed = new boolean[n]; int ans = 0; while (distatnces.size() > 0) { Distance d = distatnces.poll(); if (d.right == 0) { if (!removed[d.left]) { ans++; removed[d.left] = true; } } else { if (!removed[d.left] && !removed[d.right]) { removed[d.left] = true; removed[d.right] = true; } } } System.out.println(ans); } static class Distance implements Comparable<Distance> { int left; int right; long value; public Distance(int left, int right, long value) { this.left = left; this.right = right; this.value = value; } public int compareTo(Distance another) { if (value == another.value) { return 0; } else if (value < another.value) { return -1; } else { return 1; } } } static class Baloon { long x; long y; public Baloon(long x, long y) { this.x = x; this.y = y; } public long getDestance(Baloon b) { return (x - b.x) * (x - b.x) + (y - b.y) * (y - b.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(); } }