Submission #382562

#	Time	Username	Problem	Language	Result	Execution time	Memory
382562		vijay	Tales of seafaring (POI13_mor)	Java	30 / 100	3080 ms	131072 KiB

mor

import java.io.*;
import java.util.*;

public class mor {

    static ArrayList<Integer>[] adj;

    public static void main(String[] args) throws IOException, FileNotFoundException {
    //    Scanner in = new Scanner(new File("seafaring.in"));
        InputReader in = new InputReader();

        int N = in.nextInt();
        int M = in.nextInt();
        int K = in.nextInt();

        adj = new ArrayList[N];

        for(int i = 0; i < N; i++){
            adj[i] = new ArrayList<>();
        }

        int[][][] dp = new int[N][N][2];
        for(int i = 0; i < N; i++){
            for(int j = 0; j < N; j++){
                Arrays.fill(dp[i][j], 1000000);
            }
        }

        for(int i = 0; i < M; i++){
            int a = in.nextInt() - 1;
            int b = in.nextInt() - 1;
            dp[a][a][0] = 0;
            dp[b][b][0] = 0;
            adj[a].add(b);
            adj[b].add(a);
        }

        // check what the minimum odd path is and the minimum even path is
        for(int i = 0; i < N; i++){
            PriorityQueue<State> pq = new PriorityQueue<>();
            pq.add(new State(i, 0));
            while(!pq.isEmpty()){
                State curr = pq.poll();
                if(dp[i][curr.position][curr.distance % 2] != curr.distance){
                    continue;
                }
                for(int ap: adj[curr.position]){
                    if(curr.distance + 1 < dp[i][ap][(curr.distance + 1)%2]){
                        dp[i][ap][(curr.distance + 1)%2] = Math.min(dp[i][ap][(curr.distance + 1) % 2], curr.distance + 1);
                        pq.add(new State(ap, curr.distance + 1));
                    }
                }
            }
        }

        // for(int i = 0; i < N; i++){
        //     System.out.println("i: " + i);
        //     for(int j = 0; j < N; j++){
        //         System.out.println("    j: " + j);
        //         System.out.println("        " + Arrays.toString(dp[i][j]));
        //     }
        // }

        for(int i = 0; i < K; i++){
            int start = in.nextInt() - 1;
            int end = in.nextInt() - 1;
            int dist = in.nextInt();

//            System.out.println(Arrays.toString(distances[start][end]));

            if(dp[start][end][dist % 2] <= dist && dp[start][end][dist % 2] != 1000000){
                System.out.println("TAK");
            } else {
                System.out.println("NIE");
            }
        }

    }

    public static class State implements Comparable<State>{
        int position;
        int distance;

        public State(int position, int distance){
            this.position = position;
            this.distance = distance;
        }

        public int compareTo(State s){
            return distance - s.distance;
        }
    }

    public static class InputReader {
    
    /**
     * The default size of the InputReader's buffer is 2<sup>16</sup>.
     */
    private static final int DEFAULT_BUFFER_SIZE = 1 << 16;
    
    /**
     * The default stream for the InputReader is standard input.
     */  
    private static final InputStream DEFAULT_STREAM = System.in;
    
    /**
     * The maximum number of accurate decimal digits the method {@link #nextDoubleFast() nextDoubleFast()} can read.
     * Currently this value is set to 21 because it is the maximum number of digits a double precision float can have at the moment.
     */
    private static final int MAX_DECIMAL_PRECISION = 21;
    
    // 'c' is used to refer to the current character in the stream
    private int c;
    
    // Variables associated with the byte buffer. 
    private byte[] buf;
    private int bufferSize, bufIndex, numBytesRead;
    
    private InputStream stream;

    // End Of File (EOF) character
    private static final byte EOF   = -1;

    // New line character: '\n'
    private static final byte NEW_LINE = 10;

    // Space character: ' '
    private static final byte SPACE = 32;

    // Dash character: '-'
    private static final byte DASH  = 45;

    // Dot character: '.'
    private static final byte DOT   = 46;

    // A reusable character buffer when reading string data.
    private char[] charBuffer;

    // Primitive data type lookup tables used for optimizations
    private static byte[] bytes = new byte[58];
    private static  int[] ints  = new int[58];
    private static char[] chars = new char[128];

    static {
        char ch = ' '; int value = 0; byte _byte = 0;
        for (int i = 48; i <  58; i++ ) bytes[i] = _byte++;
        for (int i = 48; i <  58; i++ )  ints[i] = value++;
        for (int i = 32; i < 128; i++ ) chars[i] = ch++;
    }

    // Primitive double lookup table used for optimizations.
    private static final double[][] doubles = {
        { 0.0d,0.00d,0.000d,0.0000d,0.00000d,0.000000d,0.0000000d,0.00000000d,0.000000000d,0.0000000000d,0.00000000000d,0.000000000000d,0.0000000000000d,0.00000000000000d,0.000000000000000d,0.0000000000000000d,0.00000000000000000d,0.000000000000000000d,0.0000000000000000000d,0.00000000000000000000d,0.000000000000000000000d },
        { 0.1d,0.01d,0.001d,0.0001d,0.00001d,0.000001d,0.0000001d,0.00000001d,0.000000001d,0.0000000001d,0.00000000001d,0.000000000001d,0.0000000000001d,0.00000000000001d,0.000000000000001d,0.0000000000000001d,0.00000000000000001d,0.000000000000000001d,0.0000000000000000001d,0.00000000000000000001d,0.000000000000000000001d },
        { 0.2d,0.02d,0.002d,0.0002d,0.00002d,0.000002d,0.0000002d,0.00000002d,0.000000002d,0.0000000002d,0.00000000002d,0.000000000002d,0.0000000000002d,0.00000000000002d,0.000000000000002d,0.0000000000000002d,0.00000000000000002d,0.000000000000000002d,0.0000000000000000002d,0.00000000000000000002d,0.000000000000000000002d },
        { 0.3d,0.03d,0.003d,0.0003d,0.00003d,0.000003d,0.0000003d,0.00000003d,0.000000003d,0.0000000003d,0.00000000003d,0.000000000003d,0.0000000000003d,0.00000000000003d,0.000000000000003d,0.0000000000000003d,0.00000000000000003d,0.000000000000000003d,0.0000000000000000003d,0.00000000000000000003d,0.000000000000000000003d },
        { 0.4d,0.04d,0.004d,0.0004d,0.00004d,0.000004d,0.0000004d,0.00000004d,0.000000004d,0.0000000004d,0.00000000004d,0.000000000004d,0.0000000000004d,0.00000000000004d,0.000000000000004d,0.0000000000000004d,0.00000000000000004d,0.000000000000000004d,0.0000000000000000004d,0.00000000000000000004d,0.000000000000000000004d },
        { 0.5d,0.05d,0.005d,0.0005d,0.00005d,0.000005d,0.0000005d,0.00000005d,0.000000005d,0.0000000005d,0.00000000005d,0.000000000005d,0.0000000000005d,0.00000000000005d,0.000000000000005d,0.0000000000000005d,0.00000000000000005d,0.000000000000000005d,0.0000000000000000005d,0.00000000000000000005d,0.000000000000000000005d },
        { 0.6d,0.06d,0.006d,0.0006d,0.00006d,0.000006d,0.0000006d,0.00000006d,0.000000006d,0.0000000006d,0.00000000006d,0.000000000006d,0.0000000000006d,0.00000000000006d,0.000000000000006d,0.0000000000000006d,0.00000000000000006d,0.000000000000000006d,0.0000000000000000006d,0.00000000000000000006d,0.000000000000000000006d },
        { 0.7d,0.07d,0.007d,0.0007d,0.00007d,0.000007d,0.0000007d,0.00000007d,0.000000007d,0.0000000007d,0.00000000007d,0.000000000007d,0.0000000000007d,0.00000000000007d,0.000000000000007d,0.0000000000000007d,0.00000000000000007d,0.000000000000000007d,0.0000000000000000007d,0.00000000000000000007d,0.000000000000000000007d },
        { 0.8d,0.08d,0.008d,0.0008d,0.00008d,0.000008d,0.0000008d,0.00000008d,0.000000008d,0.0000000008d,0.00000000008d,0.000000000008d,0.0000000000008d,0.00000000000008d,0.000000000000008d,0.0000000000000008d,0.00000000000000008d,0.000000000000000008d,0.0000000000000000008d,0.00000000000000000008d,0.000000000000000000008d },
        { 0.9d,0.09d,0.009d,0.0009d,0.00009d,0.000009d,0.0000009d,0.00000009d,0.000000009d,0.0000000009d,0.00000000009d,0.000000000009d,0.0000000000009d,0.00000000000009d,0.000000000000009d,0.0000000000000009d,0.00000000000000009d,0.000000000000000009d,0.0000000000000000009d,0.00000000000000000009d,0.000000000000000000009d }
    };
    
    /**
     * Create an InputReader that reads from standard input.
     */
    public InputReader () {
        this(DEFAULT_STREAM, DEFAULT_BUFFER_SIZE);
    }
    
    /**
     * Create an InputReader that reads from standard input.
     * @param bufferSize    The buffer size for this input reader.
     */
    public InputReader(int bufferSize) {
        this(DEFAULT_STREAM, bufferSize);
    }
    
    /**
     * Create an InputReader that reads from standard input.
     * @param stream  Takes an InputStream as a parameter to read from.
     */
    public InputReader(InputStream stream) {
        this(stream, DEFAULT_BUFFER_SIZE);
    }

    /**
     * Create an InputReader that reads from standard input.
     * @param  stream        Takes an {@link java.io.InputStream#InputStream() InputStream} as a parameter to read from.
     * @param  bufferSize    The size of the buffer to use.
     */
    public InputReader (InputStream stream, int bufferSize) {
        if (stream == null || bufferSize <= 0)
        throw new IllegalArgumentException();
        buf = new byte[bufferSize];
        charBuffer = new char[128];
        this.bufferSize = bufferSize;
        this.stream = stream;
    }
    
    /**
     * Reads a single character from the input stream.
     * @return Returns the byte value of the next character in the buffer and EOF 
     * at the end of the stream.
     * @throws IOException throws exception if there is no more data to read
     */
    private byte read() throws IOException {

        if (numBytesRead == EOF) throw new IOException();

        if (bufIndex >= numBytesRead) {
        bufIndex = 0;
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF)
            return EOF;
        }

        return buf[bufIndex++];
    }
    
    /**
     *  Read values from the input stream until you reach a character with a 
     *  higher ASCII value than 'token'.
     * @param token The token is a value which we use to stop reading junk out of
     * the stream.
     * @return Returns 0 if a value greater than the token was reached or -1 if
     * the end of the stream was reached.
     * @throws IOException Throws exception at end of stream.
     */
    private int readJunk(int token) throws IOException { 
        
        if (numBytesRead == EOF) return EOF;

        // Seek to the first valid position index
        do {
        
        while(bufIndex < numBytesRead) {
            if (buf[bufIndex] > token) return 0;
            bufIndex++;
        }

        // reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return EOF;
        bufIndex = 0;

        } while(true);

    }
    
    /**
     * Reads a single byte from the input stream.
     * @return The next byte in the input stream
     * @throws IOException Throws exception at end of stream.
     */
    public byte nextByte() throws IOException {
        return (byte) nextInt();
    }
    
    /**
     * Reads a 32 bit signed integer from input stream.
     * @return The next integer value in the stream.
     * @throws IOException Throws exception at end of stream.
     */
    public int nextInt() throws IOException {
        
        if (readJunk(DASH-1) == EOF) throw new IOException();
        int sgn = 1, res = 0;

        c = buf[bufIndex];
        if (c == DASH) { sgn = -1; bufIndex++; }

        do {

        while(bufIndex < numBytesRead) {
            if (buf[bufIndex] > SPACE) {
            res = (res<<3)+(res<<1);
            res += ints[buf[bufIndex++]];
            } else {
            bufIndex++;
            return res*sgn;
            }
        }

        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return res*sgn;
        bufIndex = 0;

        } while(true);

    }

    /**
     * Reads a 64 bit signed long from input stream.
     * @return The next long value in the stream.
     * @throws IOException Throws exception at end of stream.
     */
    public long nextLong() throws IOException {
        
        if (readJunk(DASH-1) == EOF) throw new IOException();
        int sgn = 1;
        long res = 0L;
        c = buf[bufIndex];
        if (c == DASH) { sgn = -1; bufIndex++; }

        do {

        while(bufIndex < numBytesRead) {
            if (buf[bufIndex] > SPACE) {
            res = (res<<3)+(res<<1);
            res += ints[buf[bufIndex++]];
            } else {
            bufIndex++;
            return res*sgn;
            }
        }

        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return res*sgn;
        bufIndex = 0;

        } while(true);

    }
    
    /**
     * Doubles the size of the internal char buffer for strings
     */
    private void doubleCharBufferSize() {
        char[] newBuffer = new char[charBuffer.length << 1];
        for(int i = 0; i < charBuffer.length; i++) newBuffer[i] = charBuffer[i];
        charBuffer = newBuffer;
    }

    /**
     * Reads a line from the input stream.
     * @return Returns a line from the input stream in the form a String not 
     * including the new line character. Returns <code>null</code> when there are 
     * no more lines. 
     * @throws IOException Throws IOException when something terrible happens.
     */
    public String nextLine() throws IOException {

        try { c=read(); } catch (IOException e) { return null; }
        if (c == NEW_LINE) return ""; // Empty line
        if (c == EOF) return null; // EOF
        
        int i = 0;
        charBuffer[i++] = (char)c;

        do {

        while(bufIndex < numBytesRead) {
            if (buf[bufIndex] != NEW_LINE) {
            if (i == charBuffer.length) doubleCharBufferSize();
            charBuffer[i++] = (char) buf[bufIndex++];
            } else {
            bufIndex++;
            return new String(charBuffer, 0, i);
            }
        }

        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF)
            return new String(charBuffer, 0, i);
        bufIndex = 0;

        } while(true);

    }

    // Reads a string of characters from the input stream. 
    // The delimiter separating a string of characters is set to be:
    // any ASCII value <= 32 meaning any spaces, new lines, EOF, tabs...
    public String nextString() throws IOException {
        if (numBytesRead == EOF) return null;
        if (readJunk(SPACE) == EOF) return null;

        for(int i = 0;;) {
        while(bufIndex < numBytesRead) {
            if (buf[bufIndex] > SPACE) {
            if (i == charBuffer.length) doubleCharBufferSize();
            charBuffer[i++] = (char) buf[bufIndex++];
            } else {
            bufIndex++;
            return new String(charBuffer, 0, i);
            }
        }

        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return new String(charBuffer, 0, i);
        bufIndex = 0;
        }
    }

    // Returns an exact value a double value from the input stream.
    public double nextDouble() throws IOException {
        String doubleVal = nextString();
        if (doubleVal == null) throw new IOException();
        return Double.valueOf(doubleVal);
    }

    // Very quickly reads a double value from the input stream (~3x faster than nextDouble()). However,
    // this method may provide a slightly less accurate reading than .nextDouble() if there are a lot
    // of digits (~16+). In particular, it will only read double values with at most 21 digits after
    // the decimal point and the reading my be as inaccurate as ~5*10^-16 from the true value.
    public double nextDoubleFast() throws IOException {
        c = read(); int sgn = 1;
        while (c <= SPACE) c = read(); // while c is either: ' ', '\n', EOF
        if (c == DASH) { sgn = -1; c = read(); }
        double res = 0.0;
        // while c is not: ' ', '\n', '.' or -1
        while (c > DOT) {res *= 10.0; res += ints[c]; c = read(); }
        if (c == DOT) {
        int i = 0; c = read();
        // while c is digit and we are less than the maximum decimal precision
        while (c > SPACE && i < MAX_DECIMAL_PRECISION) {
            res += doubles[ints[c]][i++]; c = read();
        }
        }
        return res * sgn;
    }

    // Read an array of n byte values
    public byte[] nextByteArray(int n) throws IOException {
        byte[] ar = new byte[n];
        for (int i = 0; i < n; i++) ar[i] = nextByte();
        return ar;
    }

    // Read an integer array of size n
    public int[] nextIntArray(int n) throws IOException {
        int[] ar = new int[n];
        for (int i = 0; i < n; i++) ar[i] = nextInt();
        return ar;
    }

    // Read a long array of size n
    public long[] nextLongArray(int n) throws IOException {
        long[] ar = new long[n];
        for (int i = 0; i < n; i++) ar[i] = nextLong();
        return ar;
    }

    // read an of doubles of size n 
    public double[] nextDoubleArray(int n) throws IOException {
        double[] ar = new double[n];
        for (int i = 0; i < n; i++) ar[i] = nextDouble();
        return ar;
    }

    // Quickly read an array of doubles
    public double[] nextDoubleArrayFast(int n) throws IOException {
        double[] ar = new double[n];
        for (int i = 0; i < n; i++) ar[i] = nextDoubleFast();
        return ar;
    }
    
    // Read a string array of size n
    public String[] nextStringArray(int n) throws IOException {
        String[] ar = new String[n];
        for (int i = 0; i < n; i++) {
        String str = nextString();
        if (str == null) throw new IOException();
        ar[i] = str;
        }
        return ar;
    }

    // Read a 1-based byte array of size n+1
    public byte[] nextByteArray1(int n) throws IOException {
        byte[] ar = new byte[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextByte();
        return ar;
    }

    // Read a 1-based integer array of size n+1
    public int[] nextIntArray1(int n) throws IOException {
        int[] ar = new int[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextInt();
        return ar;
    }

    // Read a 1-based long array of size n+1
    public long[] nextLongArray1(int n) throws IOException {
        long[] ar = new long[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextLong();
        return ar;
    }

    // Read a 1-based double array of size n+1
    public double[] nextDoubleArray1(int n) throws IOException {
        double[] ar = new double[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextDouble();
        return ar;
    }

    // Quickly read a 1-based double array of size n+1
    public double[] nextDoubleArrayFast1(int n) throws IOException {
        double[] ar = new double[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextDoubleFast();
        return ar;
    }

    // Read a 1-based string array of size n+1
    public String[] nextStringArray1(int n) throws IOException {
        String[] ar = new String[n+1];
        for (int i = 1; i <= n; i++) ar[i] = nextString();
        return ar;
    }

    // Read a two dimensional matrix of bytes of size rows x cols
    public byte[][] nextByteMatrix(int rows, int cols) throws IOException {
        byte[][] matrix = new byte[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextByte();
        return matrix;
    }

    // Read a two dimensional matrix of ints of size rows x cols
    public int[][] nextIntMatrix(int rows, int cols) throws IOException {
        int[][] matrix = new int[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextInt();
        return matrix;
    }

    // Read a two dimensional matrix of longs of size rows x cols
    public long[][] nextLongMatrix(int rows, int cols) throws IOException {
        long[][] matrix = new long[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextLong();
        return matrix;
    }

    // Read a two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrix(int rows, int cols) throws IOException {
        double[][] matrix = new double[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextDouble();
        return matrix;
    }

    // Quickly read a two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrixFast(int rows, int cols) throws IOException {
        double[][] matrix = new double[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextDoubleFast();
        return matrix;
    }
    
    // Read a two dimensional matrix of Strings of size rows x cols
    public String[][] nextStringMatrix(int rows, int cols) throws IOException {
        String[][] matrix = new String[rows][cols];
        for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
            matrix[i][j] = nextString();
        return matrix;    
    }

    // Read a 1-based two dimensional matrix of bytes of size rows x cols
    public byte[][] nextByteMatrix1(int rows, int cols) throws IOException {
        byte[][] matrix = new byte[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextByte();
        return matrix;
    }

    // Read a 1-based two dimensional matrix of ints of size rows x cols
    public int[][] nextIntMatrix1(int rows, int cols) throws IOException {
        int[][] matrix = new int[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextInt();
        return matrix;
    }

    // Read a 1-based two dimensional matrix of longs of size rows x cols
    public long[][] nextLongMatrix1(int rows, int cols) throws IOException {
        long[][] matrix = new long[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextLong();
        return matrix;
    }

    // Read a 1-based two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrix1(int rows, int cols) throws IOException {
        double[][] matrix = new double[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextDouble();
        return matrix;
    }

    // Quickly read a 1-based two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrixFast1(int rows, int cols) throws IOException {
        double[][] matrix = new double[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextDoubleFast();
        return matrix;
    }
    
    // Read a 1-based two dimensional matrix of Strings of size rows x cols
    public String[][] nextStringMatrix1(int rows, int cols) throws IOException {
        String[][] matrix = new String[rows+1][cols+1];
        for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
            matrix[i][j] = nextString();
        return matrix;    
    }

    // Closes the input stream
    public void close() throws IOException {
        stream.close();
    }

    }
}

Compilation message (stderr)

Note: mor.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

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