結果

問題 No.168 ものさし
ユーザー tentententen
提出日時 2023-01-26 19:18:04
言語 Java21
(openjdk 21)
結果
AC  
実行時間 623 ms / 2,000 ms
コード長 4,091 bytes
コンパイル時間 3,164 ms
コンパイル使用メモリ 81,520 KB
実行使用メモリ 80,676 KB
最終ジャッジ日時 2023-09-09 18:41:11
合計ジャッジ時間 10,278 ms
ジャッジサーバーID
(参考情報)
judge14 / judge11
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 236 ms
59,860 KB
testcase_01 AC 43 ms
49,732 KB
testcase_02 AC 42 ms
50,252 KB
testcase_03 AC 42 ms
49,764 KB
testcase_04 AC 41 ms
49,808 KB
testcase_05 AC 42 ms
49,788 KB
testcase_06 AC 43 ms
49,728 KB
testcase_07 AC 42 ms
49,828 KB
testcase_08 AC 42 ms
49,816 KB
testcase_09 AC 53 ms
50,096 KB
testcase_10 AC 89 ms
53,220 KB
testcase_11 AC 249 ms
59,996 KB
testcase_12 AC 482 ms
73,032 KB
testcase_13 AC 586 ms
80,456 KB
testcase_14 AC 623 ms
80,628 KB
testcase_15 AC 43 ms
49,724 KB
testcase_16 AC 51 ms
49,932 KB
testcase_17 AC 62 ms
51,780 KB
testcase_18 AC 105 ms
53,412 KB
testcase_19 AC 588 ms
80,076 KB
testcase_20 AC 592 ms
80,676 KB
testcase_21 AC 616 ms
80,280 KB
testcase_22 AC 582 ms
80,108 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();
        Point[] points = new Point[n];
        for (int i = 0; i < n; i++) {
            points[i] = new Point(sc.nextInt(), sc.nextInt());
        }
        ArrayList<Line> lines = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            for (int j = i + 1; j < n; j++) {
                lines.add(new Line(i, j, points[i].getDistance(points[j])));
            }
        }
        Collections.sort(lines);
        UnionFindTree uft = new UnionFindTree(n);
        long ans = 0;
        for (Line x : lines) {
            uft.unite(x);
            ans = x.value;
            if (uft.same(0, n - 1)) {
                break;
            }
        }
        long left = 0;
        long right = Integer.MAX_VALUE / 10;
        while (right - left > 1) {
            long m = (left + right) / 2;
            if (m * m * 100 < ans) {
                left = m;
            } else {
                right = m;
            }
        }
        System.out.println(right * 10);
    }
    
    static class UnionFindTree {
        int[] parents;
        
        public UnionFindTree(int size) {
            parents = new int[size];
            for (int i = 0; i < size; i++) {
                parents[i] = i;
            }
        }
        
        public int find(int x) {
            if (x == parents[x]) {
                return x;
            } else {
                return parents[x] = find(parents[x]);
            }
        }
        
        public boolean same(int x, int y) {
            return find(x) == find(y);
        }
        
        public void unite(int x, int y) {
            if (!same(x, y)) {
                parents[find(x)] = find(y);
            }
        }
        
        public void unite(Line x) {
            unite(x.left, x.right);
        }
    }
    
    static class Line implements Comparable<Line> {
        int left = 0;
        int right = 0;
        long value;
        
        public Line(int left, int right, long value) {
            this.left = left;
            this.right = right;
            this.value = value;
        }
        
        public int compareTo(Line 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();
    }
    
}
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