結果

問題 No.2354 Poor Sight in Winter
ユーザー tentententen
提出日時 2023-12-12 10:49:24
言語 Java21
(openjdk 21)
結果
AC  
実行時間 417 ms / 2,000 ms
コード長 3,556 bytes
コンパイル時間 2,513 ms
コンパイル使用メモリ 91,868 KB
実行使用メモリ 67,096 KB
最終ジャッジ日時 2024-09-27 04:53:46
合計ジャッジ時間 7,831 ms
ジャッジサーバーID
(参考情報)
judge3 / 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 50 ms
50,360 KB
testcase_01 AC 51 ms
50,408 KB
testcase_02 AC 52 ms
50,516 KB
testcase_03 AC 52 ms
50,504 KB
testcase_04 AC 53 ms
50,400 KB
testcase_05 AC 52 ms
50,412 KB
testcase_06 AC 51 ms
50,496 KB
testcase_07 AC 50 ms
50,516 KB
testcase_08 AC 52 ms
50,456 KB
testcase_09 AC 51 ms
50,508 KB
testcase_10 AC 52 ms
50,560 KB
testcase_11 AC 99 ms
51,736 KB
testcase_12 AC 309 ms
67,096 KB
testcase_13 AC 251 ms
65,432 KB
testcase_14 AC 417 ms
65,632 KB
testcase_15 AC 170 ms
56,840 KB
testcase_16 AC 332 ms
64,768 KB
testcase_17 AC 369 ms
64,696 KB
testcase_18 AC 149 ms
56,168 KB
testcase_19 AC 211 ms
59,084 KB
testcase_20 AC 102 ms
52,680 KB
testcase_21 AC 89 ms
52,144 KB
testcase_22 AC 147 ms
56,560 KB
testcase_23 AC 106 ms
53,804 KB
testcase_24 AC 229 ms
58,524 KB
testcase_25 AC 106 ms
53,552 KB
testcase_26 AC 106 ms
53,696 KB
testcase_27 AC 74 ms
50,836 KB
testcase_28 AC 88 ms
52,112 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();
        int k = sc.nextInt();
        Point[] points = new Point[n + 2];
        int[][] distances = new int[n + 2][n + 2];
        for (int i = 0; i < n + 2; i++) {
            points[i] = new Point(sc.nextInt(), sc.nextInt());
            for (int j = 0; j < i; j++) {
                int d = points[i].getDistance(points[j]);
                distances[i][j] = d;
                distances[j][i] = d;
            }
        }
        int left = 0;
        int right = Integer.MAX_VALUE / 2;
        PriorityQueue<Path> queue = new PriorityQueue<>();
        int[] costs = new int[n + 2];
        while (right - left > 1) {
            int m = (left + right) / 2;
            queue.clear();
            queue.add(new Path(0, 0));
            Arrays.fill(costs, Integer.MAX_VALUE);
            while (queue.size() > 0) {
                Path p = queue.poll();
                if (costs[p.idx] <= p.value) {
                    continue;
                }
                costs[p.idx] = p.value;
                if (p.idx == 1) {
                    break;
                }
                for (int i = 0; i < n + 2; i++) {
                    if (costs[i] == Integer.MAX_VALUE) {
                        queue.add(new Path(i, p.value + (distances[i][p.idx] + m - 1) / m - 1));
                    }
                }
            }
            if (costs[1] <= k) {
                right = m;
            } else {
                left = m;
            }
        }
        System.out.println(right);
    }
    
    static class Path implements Comparable<Path> {
        int idx;
        int value;
        
        public Path(int idx, int value) {
            this.idx = idx;
            this.value = value;
        }
        
        public int compareTo(Path another) {
            return value - another.value;
        }
    }
    
    static class Point {
        int x;
        int y;
        
        public Point(int x, int y) {
            this.x = x;
            this.y = y;
        }
        
        public int getDistance(Point p) {
            return Math.abs(x - p.x) + Math.abs(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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