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 Java21
(openjdk 21)
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)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 52 ms
37,084 KB
testcase_01 AC 54 ms
37,064 KB
testcase_02 AC 52 ms
36,740 KB
testcase_03 AC 53 ms
36,804 KB
testcase_04 AC 52 ms
37,128 KB
testcase_05 AC 53 ms
36,856 KB
testcase_06 AC 53 ms
37,068 KB
testcase_07 AC 53 ms
36,948 KB
testcase_08 AC 54 ms
36,664 KB
testcase_09 AC 54 ms
36,848 KB
testcase_10 AC 54 ms
37,024 KB
testcase_11 AC 53 ms
37,024 KB
testcase_12 AC 51 ms
37,072 KB
testcase_13 AC 53 ms
36,948 KB
testcase_14 AC 156 ms
41,912 KB
testcase_15 AC 124 ms
41,400 KB
testcase_16 AC 100 ms
39,500 KB
testcase_17 AC 275 ms
52,404 KB
testcase_18 AC 110 ms
39,584 KB
testcase_19 AC 102 ms
39,452 KB
testcase_20 AC 157 ms
41,888 KB
testcase_21 AC 176 ms
45,940 KB
testcase_22 AC 164 ms
45,632 KB
testcase_23 AC 165 ms
45,772 KB
testcase_24 AC 414 ms
59,800 KB
testcase_25 AC 432 ms
59,856 KB
testcase_26 AC 557 ms
59,700 KB
testcase_27 AC 436 ms
59,768 KB
testcase_28 AC 576 ms
59,752 KB
testcase_29 AC 414 ms
59,700 KB
testcase_30 AC 404 ms
59,500 KB
testcase_31 AC 435 ms
60,020 KB
testcase_32 AC 422 ms
59,928 KB
testcase_33 AC 420 ms
59,748 KB
testcase_34 AC 54 ms
37,348 KB
testcase_35 AC 53 ms
37,148 KB
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ソースコード

diff #

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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