POJ 刷题系列：2632. Crashing Robots

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Map;
import java.util.StringTokenizer;

public class Main{

    String INPUT = "./data/judge/201712/P2632.txt";

    public static void main(String[] args) throws IOException {
        new Main().run();
    }

    int R, C;
    int N, M;

    int[][] dir = {{0, 1}, {-1, 0}, {0, -1}, {1, 0}}; // E N W S

    void read() {
        int t = ni();
        while (t --> 0) {
            C = ni();
            R = ni();
            N = ni();
            M = ni();

            int[][] pos = new int[N][2]; 
            int[] direction = new int[N];

            int[][] grid = new int[R][C];

            for (int i = 0; i < N; ++i) {
                int x = ni();
                int y = ni();
                pos[i] = new int[] {R - y, x - 1};
                grid[R - y][x - 1] = i + 1;
                char d = nc();
                if (d == 'E') {
                    direction[i] = 0;
                }
                if (d == 'W') {
                    direction[i] = 2;
                }
                if (d == 'N') {
                    direction[i] = 1;
                }
                if (d == 'S') {
                    direction[i] = 3;
                }
            }

            boolean valid = true;
            for (int i = 0; i < M; ++i) {
                int robot  = ni();
                char inst  = nc();
                int repeat = ni();

                if (!valid) continue;

                if (inst == 'L') {
                    direction[robot - 1] = (direction[robot - 1] + repeat) % 4; 
                }
                else if (inst == 'R') {
                    direction[robot - 1] = (direction[robot - 1] - repeat % 4 + 4) % 4; 
                }
                else {
                    // simulation
                    int[] move = dir[direction[robot - 1]];
                    grid[pos[robot - 1][0]][pos[robot - 1][1]] = 0;
                    for (int j = 0; j < repeat; ++j) {
                        int nr = pos[robot - 1][0] + move[0];
                        int nc = pos[robot - 1][1] + move[1];
                        if (nr < 0 || nr >= R || nc < 0 || nc >= C) {
                            if (valid) out.println("Robot " + robot + " crashes into the wall");
                            valid = false;
                            break;
                        }

                        if (grid[nr][nc] != 0) {
                            if (valid) out.println("Robot " + robot + " crashes into robot " + grid[nr][nc]);
                            valid = false;
                            break;
                        }

                        pos[robot - 1][0] = nr;
                        pos[robot - 1][1] = nc;
                    }

                    grid[pos[robot - 1][0]][pos[robot - 1][1]] = robot;
                }
            }

            if (valid) out.println("OK");
        }
    }

    FastScanner in;
    PrintWriter out;

    void run() throws IOException {
        boolean oj;
        try {
            oj = ! System.getProperty("user.dir").equals("F:\\oxygen_workspace\\Algorithm");
        } catch (Exception e) {
            oj = System.getProperty("ONLINE_JUDGE") != null;
        }

        InputStream is = oj ? System.in : new FileInputStream(new File(INPUT));
        in = new FastScanner(is);
        out = new PrintWriter(System.out);
        long s = System.currentTimeMillis();
        read();
        out.flush();
        if (!oj){
            System.out.println("[" + (System.currentTimeMillis() - s) + "ms]");
        }
    }

    public boolean more(){
        return in.hasNext();
    }

    public int ni(){
        return in.nextInt();
    }

    public long nl(){
        return in.nextLong();
    }

    public double nd(){
        return in.nextDouble();
    }

    public String ns(){
        return in.nextString();
    }

    public char nc(){
        return in.nextChar();
    }

    class FastScanner {
        BufferedReader br;
        StringTokenizer st;
        boolean hasNext;

        public FastScanner(InputStream is) throws IOException {
            br = new BufferedReader(new InputStreamReader(is));
            hasNext = true;
        }

        public String nextToken() {
            while (st == null || !st.hasMoreTokens()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (Exception e) {
                    hasNext = false;
                    return "##";
                }
            }
            return st.nextToken();
        }

        String next = null;
        public boolean hasNext(){
            next = nextToken();
            return hasNext;
        }

        public int nextInt() {
            if (next == null){
                hasNext();
            }
            String more = next;
            next = null;
            return Integer.parseInt(more);
        }

        public long nextLong() {
            if (next == null){
                hasNext();
            }
            String more = next;
            next = null;
            return Long.parseLong(more);
        }

        public double nextDouble() {
            if (next == null){
                hasNext();
            }
            String more = next;
            next = null;
            return Double.parseDouble(more);
        }

        public String nextString(){
            if (next == null){
                hasNext();
            }
            String more = next;
            next = null;
            return more;
        }

        public char nextChar(){
            if (next == null){
                hasNext();
            }
            String more = next;
            next = null;
            return more.charAt(0);
        }
    }

    static class D{

        public static void pp(int[][] board, int row, int col) {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < row; ++i) {
                for (int j = 0; j < col; ++j) {
                    sb.append(board[i][j] + (j + 1 == col ? "\n" : " "));
                }
            }
            System.out.println(sb.toString());
        }

        public static void pp(char[][] board, int row, int col) {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < row; ++i) {
                for (int j = 0; j < col; ++j) {
                    sb.append(board[i][j] + (j + 1 == col ? "\n" : " "));
                }
            }
            System.out.println(sb.toString());
        }
    }

    static class ArrayUtils {

        public static void fill(int[][] f, int value) {
            for (int i = 0; i < f.length; ++i) {
                Arrays.fill(f[i], value);
            }
        }

        public static void fill(int[][][] f, int value) {
            for (int i = 0; i < f.length; ++i) {
                fill(f[i], value);
            }
        }

        public static void fill(int[][][][] f, int value) {
            for (int i = 0; i < f.length; ++i) {
                fill(f[i], value);
            }
        }
    }

    static class Num{
        public static <K> void inc(Map<K, Integer> mem, K k) {
            if (!mem.containsKey(k)) mem.put(k, 0);
            mem.put(k, mem.get(k) + 1);
        }
    }
}