結果

問題 No.1265 Balloon Survival
ユーザー shojin_proshojin_pro
提出日時 2020-10-23 22:50:14
言語 Java21
(openjdk 21)
結果
AC  
実行時間 738 ms / 2,000 ms
コード長 4,076 bytes
コンパイル時間 4,601 ms
コンパイル使用メモリ 76,936 KB
実行使用メモリ 80,508 KB
最終ジャッジ日時 2023-09-28 17:15:41
合計ジャッジ時間 16,385 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge12
このコードへのチャレンジ
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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 47 ms
49,680 KB
testcase_01 AC 47 ms
49,660 KB
testcase_02 AC 46 ms
49,956 KB
testcase_03 AC 47 ms
49,640 KB
testcase_04 AC 47 ms
49,608 KB
testcase_05 AC 49 ms
49,744 KB
testcase_06 AC 49 ms
49,644 KB
testcase_07 AC 47 ms
49,628 KB
testcase_08 AC 47 ms
49,748 KB
testcase_09 AC 47 ms
49,688 KB
testcase_10 AC 48 ms
49,872 KB
testcase_11 AC 47 ms
49,688 KB
testcase_12 AC 49 ms
49,664 KB
testcase_13 AC 47 ms
49,800 KB
testcase_14 AC 184 ms
57,384 KB
testcase_15 AC 146 ms
57,304 KB
testcase_16 AC 105 ms
53,972 KB
testcase_17 AC 507 ms
65,836 KB
testcase_18 AC 120 ms
54,056 KB
testcase_19 AC 109 ms
53,620 KB
testcase_20 AC 184 ms
57,256 KB
testcase_21 AC 321 ms
60,168 KB
testcase_22 AC 233 ms
59,808 KB
testcase_23 AC 227 ms
59,916 KB
testcase_24 AC 704 ms
80,476 KB
testcase_25 AC 738 ms
80,352 KB
testcase_26 AC 665 ms
80,164 KB
testcase_27 AC 628 ms
80,508 KB
testcase_28 AC 648 ms
80,388 KB
testcase_29 AC 719 ms
80,384 KB
testcase_30 AC 658 ms
79,884 KB
testcase_31 AC 664 ms
80,096 KB
testcase_32 AC 611 ms
80,424 KB
testcase_33 AC 686 ms
80,448 KB
testcase_34 AC 50 ms
49,632 KB
testcase_35 AC 48 ms
49,832 KB
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 # 

import java.util.*;
import java.io.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        FastScanner sc = new FastScanner(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        StringBuilder sb = new StringBuilder();
        int n = sc.nextInt();
        boolean[] bomb = new boolean[n];
        Balloon[] bl = new Balloon[n];
        for(int i = 0; i < n; i++){
            int x = sc.nextInt();
            int y = sc.nextInt();
            bl[i] = new Balloon(x,y);
        }
        ArrayList<Dist> dl = new ArrayList<>();
        for(int i = 0; i < n; i++){
            for(int j = i+1; j < n; j++){
                dl.add(new Dist(i,j,(long)(bl[i].x-bl[j].x)*(bl[i].x-bl[j].x) + (long)(bl[i].y-bl[j].y)*(bl[i].y-bl[j].y)));
            }
        }
        Collections.sort(dl);
        int ans = 0;
        for(Dist d : dl){
            //pw.println(d.i + " " + d.j + " " + d.dist);
            if(d.i != 0 && d.j != 0){
                if(!bomb[d.i] && !bomb[d.j]){
                    bomb[d.i] = true;
                    bomb[d.j] = true;
                }
            }else if(d.i == 0){
                if(!bomb[d.j]) ans++;
                bomb[d.j] = true;
            }else{
                if(!bomb[d.i]) ans++;
                bomb[d.i] = true;
            }
        }
        pw.println(ans);
        pw.flush();
    }

    static class GeekInteger {
        public static void save_sort(int[] array) {
            shuffle(array);
            Arrays.sort(array);
        }
 
        public static int[] shuffle(int[] array) {
            int n = array.length;
            Random random = new Random();
            for (int i = 0, j; i < n; i++) {
                j = i + random.nextInt(n - i);
                int randomElement = array[j];
                array[j] = array[i];
                array[i] = randomElement;
            }
            return array;
        }
 
    }
}

class Balloon{
    int x,y;
    public Balloon(int x, int y){
        this.x = x;
        this.y = y;
    }
}

class Dist implements Comparable<Dist>{
    int i,j;
    long dist;
    public Dist(int i, int j, long dist){
        this.i = i;
        this.j = j;
        this.dist = dist;
    }
    
    public int compareTo(Dist d){
        if(this.dist < d.dist){
            return -1;
        }else if(this.dist > d.dist){
            return 1;
        }else{
            return 0;
        }
    }
}
class FastScanner {
    private BufferedReader reader = null;
    private StringTokenizer tokenizer = null;
    public FastScanner(InputStream in) {
        reader = new BufferedReader(new InputStreamReader(in));
        tokenizer = null;
    }

    public String next() {
        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public String nextLine() {
        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                return reader.readLine();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken("\n");
    }

    public long nextLong() {
        return Long.parseLong(next());
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

    public double nextDouble() {
         return Double.parseDouble(next());
    }
    
    public String[] nextArray(int n) {
        String[] a = new String[n];
        for (int i = 0; i < n; i++)
            a[i] = next();
        return a;
    }

    public int[] nextIntArray(int n) {
        int[] a = new int[n];
        for (int i = 0; i < n; i++)
            a[i] = nextInt();
        return a;
    }

    public long[] nextLongArray(int n) {
        long[] a = new long[n];
        for (int i = 0; i < n; i++)
            a[i] = nextLong();
        return a;
    } 
}
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