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 |
(要ログイン)
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();}}