結果

問題 No.2674 k-Walk on Bipartite
ユーザー Yu_212Yu_212
提出日時 2024-03-15 21:55:12
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 9,776 bytes
コンパイル時間 2,680 ms
コンパイル使用メモリ 89,624 KB
実行使用メモリ 79,220 KB
最終ジャッジ日時 2024-09-30 00:59:47
合計ジャッジ時間 9,839 ms
ジャッジサーバーID
（参考情報） 		judge1 / 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 56 ms
50,352 KB
testcase_01 AC 56 ms
50,436 KB
testcase_02 AC 54 ms
50,164 KB
testcase_03 AC 54 ms
50,232 KB
testcase_04 AC 55 ms
50,368 KB
testcase_05 AC 54 ms
50,280 KB
testcase_06 AC 54 ms
50,276 KB
testcase_07 AC 254 ms
73,996 KB
testcase_08 AC 261 ms
73,360 KB
testcase_09 AC 204 ms
67,964 KB
testcase_10 AC 292 ms
75,244 KB
testcase_11 AC 276 ms
65,084 KB
testcase_12 AC 285 ms
75,592 KB
testcase_13 AC 181 ms
64,076 KB
testcase_14 AC 116 ms
58,452 KB
testcase_15 AC 420 ms
75,412 KB
testcase_16 AC 358 ms
73,932 KB
testcase_17 AC 350 ms
73,288 KB
testcase_18 AC 170 ms
61,448 KB
testcase_19 AC 245 ms
65,628 KB
testcase_20 AC 239 ms
65,528 KB
testcase_21 AC 298 ms
74,404 KB
testcase_22 AC 401 ms
79,220 KB
testcase_23 AC 57 ms
50,400 KB
testcase_24 AC 57 ms
50,232 KB
testcase_25 AC 58 ms
50,192 KB
testcase_26 AC 55 ms
50,200 KB
testcase_27 AC 57 ms
50,336 KB
testcase_28 WA -
testcase_29 WA -
testcase_30 AC 58 ms
50,272 KB
testcase_31 AC 55 ms
50,084 KB
testcase_32 AC 57 ms
49,924 KB
testcase_33 AC 56 ms
50,224 KB
testcase_34 AC 55 ms
50,256 KB
testcase_35 AC 54 ms
50,276 KB
testcase_36 AC 56 ms
50,268 KB
testcase_37 AC 56 ms
50,132 KB
testcase_38 AC 56 ms
50,220 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.io.BufferedInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import java.util.function.IntUnaryOperator;
import java.util.function.LongUnaryOperator;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class Main {
    static In in = new In();
    static Out out = new Out(false, false);
    static final long inf = 0x1fffffffffffffffL;
    static final int iinf = 0x3fffffff;
    static final double eps = 1e-9;
    static long mod = 998244353;

    void solve() {
        int n = in.nextInt();
        int m = in.nextInt();
        int s = in.nextInt() - 1;
        int t = in.nextInt() - 1;
        int k = in.nextInt();
        List<List<Integer>> edges = in.nextGraph(n, m, false);
        Deque<Integer> deque = new ArrayDeque<>();
        int[] dist = new int[n];
        Arrays.fill(dist, iinf);
        dist[s] = 0;
        deque.addLast(s);
        while (!deque.isEmpty()) {
            Integer v = deque.removeFirst();
            for (Integer u : edges.get(v)) {
                if (dist[u] > dist[v] + 1) {
                    dist[u] = dist[v] + 1;
                    deque.addLast(u);
                }
            }
        }
        if (s == t) {
            if (k % 2 == 1) {
                out.println("No");
            } else if (n == 1) {
                out.println("No");
            } else if (edges.get(s).isEmpty()) {
                out.println("Unknown");
            } else {
                out.println("Yes");
            }
            return;
        }
        if (dist[t] >= iinf) {
            out.println("Unknown");
        } else if (dist[t] % 2 != k % 2) {
            out.println("No");
        } else if (dist[t] <= k) {
            out.println("Yes");
        } else {
            out.println("Unknown");
        }
    }

    public static void main(String... args) {
        new Main().solve();
        out.flush();
    }
}

class In {
    private final BufferedInputStream reader = new BufferedInputStream(System.in);
    private final byte[] buffer = new byte[0x10000];
    private int i = 0;
    private int length = 0;

    public int read() {
        if (i == length) {
            i = 0;
            try {
                length = reader.read(buffer);
            } catch (IOException ignored) {
            }
            if (length == -1) {
                return 0;
            }
        }
        if (length <= i) {
            throw new RuntimeException();
        }
        return buffer[i++];
    }

    public String next() {
        StringBuilder builder = new StringBuilder();
        int b = read();
        while (b < '!' || '~' < b) {
            b = read();
        }
        while ('!' <= b && b <= '~') {
            builder.appendCodePoint(b);
            b = read();
        }
        return builder.toString();
    }

    public String nextLine() {
        StringBuilder builder = new StringBuilder();
        int b = read();
        while (b != 0 && b != '\r' && b != '\n') {
            builder.appendCodePoint(b);
            b = read();
        }
        if (b == '\r') {
            read();
        }
        return builder.toString();
    }

    public int nextInt() {
        long val = nextLong();
        if (val < Integer.MIN_VALUE || Integer.MAX_VALUE < val) {
            throw new NumberFormatException();
        }
        return (int)val;
    }

    public long nextLong() {
        int b = read();
        while (b < '!' || '~' < b) {
            b = read();
        }
        boolean neg = false;
        if (b == '-') {
            neg = true;
            b = read();
        }
        long n = 0;
        int c = 0;
        while ('0' <= b && b <= '9') {
            n = n * 10 + b - '0';
            b = read();
            c++;
        }
        if (c == 0 || c >= 2 && n == 0) {
            throw new NumberFormatException();
        }
        return neg ? -n : n;
    }

    public double nextDouble() {
        return Double.parseDouble(next());
    }

    public char[] nextCharArray() {
        return next().toCharArray();
    }

    public String[] nextStringArray(int n) {
        String[] s = new String[n];
        for (int i = 0; i < n; i++) {
            s[i] = next();
        }
        return s;
    }

    public char[][] nextCharMatrix(int n, int m) {
        char[][] a = new char[n][m];
        for (int i = 0; i < n; i++) {
            a[i] = next().toCharArray();
        }
        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 int[] nextIntArray(int n, IntUnaryOperator op) {
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = op.applyAsInt(nextInt());
        }
        return a;
    }

    public int[][] nextIntMatrix(int h, int w) {
        int[][] a = new int[h][w];
        for (int i = 0; i < h; i++) {
            a[i] = nextIntArray(w);
        }
        return a;
    }

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

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

    public long[][] nextLongMatrix(int h, int w) {
        long[][] a = new long[h][w];
        for (int i = 0; i < h; i++) {
            a[i] = nextLongArray(w);
        }
        return a;
    }

    public List<List<Integer>> nextGraph(int n, int m, boolean directed) {
        List<List<Integer>> res = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            res.add(new ArrayList<>());
        }
        for (int i = 0; i < m; i++) {
            int u = nextInt() - 1;
            int v = nextInt() - 1;
            res.get(u).add(v);
            if (!directed) {
                res.get(v).add(u);
            }
        }
        return res;
    }
}

class Out {
    private final PrintWriter out = new PrintWriter(System.out);
    private final PrintWriter err = new PrintWriter(System.err);
    public boolean autoFlush;
    public boolean enableDebug;

    public Out(boolean autoFlush, boolean enableDebug) {
        this.autoFlush = autoFlush;
        this.enableDebug = enableDebug;
    }

    public void debug(Object... args) {
        if (!enableDebug) {
            return;
        }
        if (args == null || args.getClass() != Object[].class) {
            args = new Object[] {args};
        }
        err.println(Arrays.stream(args).map(obj -> format(obj, true)).collect(Collectors.joining(" ")));
        err.flush();
    }

    private String format(Object obj, boolean canMultiline) {
        if (obj == null) return "null";
        Class<?> clazz = obj.getClass();
        if (clazz == Double.class) return String.format("%.10f", obj);
        if (clazz == int[].class) return Arrays.toString((int[])obj);
        if (clazz == long[].class) return Arrays.toString((long[])obj);
        if (clazz == char[].class) return String.valueOf((char[])obj);
        if (clazz == boolean[].class) return IntStream.range(0, ((boolean[])obj).length).mapToObj(i -> ((boolean[])obj)[i] ? "1" : "0").collect(Collectors.joining());
        if (clazz == double[].class) return Arrays.toString(Arrays.stream((double[])obj).mapToObj(a -> format(a, false)).toArray());
        if (canMultiline && clazz.isArray() && clazz.componentType().isArray()) return Arrays.stream((Object[])obj).map(a -> format(a, false)).collect(Collectors.joining("\n"));
        if (clazz == Object[].class) return Arrays.toString(Arrays.stream((Object[])obj).map(a -> format(a, false)).toArray());
        if (clazz.isArray()) return Arrays.toString((Object[])obj);
        return String.valueOf(obj);
    }

    public void println(Object... args) {
        if (args == null || args.getClass() != Object[].class) {
            args = new Object[] {args};
        }
        out.println(Arrays.stream(args)
                .map(obj -> obj instanceof Double ? String.format("%.10f", obj) : String.valueOf(obj))
                .collect(Collectors.joining(" ")));
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(char a) {
        out.println(a);
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(int a) {
        out.println(a);
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(long a) {
        out.println(a);
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(double a) {
        out.println(String.format("%.10f", a));
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(String s) {
        out.println(s);
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(char[] s) {
        out.println(String.valueOf(s));
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(int[] a) {
        StringJoiner joiner = new StringJoiner(" ");
        for (int i : a) {
            joiner.add(Integer.toString(i));
        }
        out.println(joiner);
        if (autoFlush) {
            out.flush();
        }
    }

    public void println(long[] a) {
        StringJoiner joiner = new StringJoiner(" ");
        for (long i : a) {
            joiner.add(Long.toString(i));
        }
        out.println(joiner);
        if (autoFlush) {
            out.flush();
        }
    }

    public void flush() {
        err.flush();
        out.flush();
    }
}
0