結果
| 問題 |
No.1265 Balloon Survival
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-02-16 18:07:05 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 529 ms / 2,000 ms |
| コード長 | 3,196 bytes |
| コンパイル時間 | 2,563 ms |
| コンパイル使用メモリ | 98,920 KB |
| 実行使用メモリ | 69,548 KB |
| 最終ジャッジ日時 | 2024-07-18 18:02:09 |
| 合計ジャッジ時間 | 11,298 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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();
Point[] points = new Point[n];
ArrayList<Distance> distances = new ArrayList<>();
for (int i = 0; i < n; i++) {
points[i] = new Point(sc.nextInt(), sc.nextInt());
for (int j = 0; j < i; j++) {
distances.add(new Distance(j, i, points[i].getDistance(points[j])));
}
}
Collections.sort(distances);
int ans = 0;
boolean[] used = new boolean[n];
for (Distance x : distances) {
if (x.left == 0) {
if (!used[x.right]) {
used[x.right] = true;
ans++;
}
} else {
if (!used[x.left] && !used[x.right]) {
used[x.left] = true;
used[x.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 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 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();
}
}
tenten