結果

問題 No.1607 Kth Maximum Card
ユーザー tentententen
提出日時 2023-02-03 13:58:40
言語 Java21
(openjdk 21)
結果
AC  
実行時間 3,393 ms / 3,500 ms
コード長 3,196 bytes
コンパイル時間 3,646 ms
コンパイル使用メモリ 87,456 KB
実行使用メモリ 104,664 KB
最終ジャッジ日時 2023-09-15 10:20:50
合計ジャッジ時間 47,879 ms
ジャッジサーバーID
(参考情報)
judge12 / judge13
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 45 ms
49,456 KB
testcase_01 AC 44 ms
49,568 KB
testcase_02 AC 46 ms
49,648 KB
testcase_03 AC 46 ms
49,512 KB
testcase_04 AC 45 ms
49,552 KB
testcase_05 AC 44 ms
49,592 KB
testcase_06 AC 44 ms
49,780 KB
testcase_07 AC 44 ms
49,560 KB
testcase_08 AC 3,192 ms
97,564 KB
testcase_09 AC 3,023 ms
89,996 KB
testcase_10 AC 3,393 ms
97,504 KB
testcase_11 AC 910 ms
65,316 KB
testcase_12 AC 2,721 ms
90,988 KB
testcase_13 AC 634 ms
62,844 KB
testcase_14 AC 621 ms
63,368 KB
testcase_15 AC 2,080 ms
92,248 KB
testcase_16 AC 594 ms
63,232 KB
testcase_17 AC 365 ms
59,084 KB
testcase_18 AC 1,227 ms
77,056 KB
testcase_19 AC 905 ms
66,616 KB
testcase_20 AC 1,184 ms
74,468 KB
testcase_21 AC 1,303 ms
74,984 KB
testcase_22 AC 2,015 ms
98,896 KB
testcase_23 AC 2,114 ms
98,656 KB
testcase_24 AC 956 ms
70,208 KB
testcase_25 AC 696 ms
63,412 KB
testcase_26 AC 711 ms
65,504 KB
testcase_27 AC 920 ms
71,636 KB
testcase_28 AC 770 ms
65,464 KB
testcase_29 AC 1,623 ms
79,076 KB
testcase_30 AC 2,503 ms
96,452 KB
testcase_31 AC 1,573 ms
76,264 KB
testcase_32 AC 1,400 ms
102,464 KB
testcase_33 AC 1,361 ms
104,664 KB
testcase_34 AC 1,380 ms
104,392 KB
testcase_35 AC 1,309 ms
104,464 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 m = sc.nextInt();
        int k = sc.nextInt();
        ArrayList<ArrayList<Path>> graph = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            graph.add(new ArrayList<>());
        }
        for (int i = 0; i < m; i++) {
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            int c = sc.nextInt();
            graph.get(a).add(new Path(b, c));
            graph.get(b).add(new Path(a, c));
        }
        int left = -1;
        int right = 200001;
        int[] costs = new int[n];
        PriorityQueue<Path> queue = new PriorityQueue<>();
        while (right - left > 1) {
            int z = (left + right) / 2;
            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;
                for (Path x : graph.get(p.idx)) {
                    int add = 0;
                    if (x.value > z) {
                        add = 1;
                    }
                    queue.add(new Path(x.idx, p.value + add));
                }
            }
            if (costs[n - 1] >= k) {
                left = z;
            } else {
                right = z;
            }
        }
        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;
        }
    }
}
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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