結果

問題 No.1265 Balloon Survival
ユーザー tentententen
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
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 4
other AC * 32
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.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();
}
}
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