oj.uz

Submission #581672

# Submission time Handle Problem Language Result Execution time Memory
581672 2022-06-23T02:45:04 Z DylanSmith Mecho (IOI09_mecho) Java 11
100 / 100
 740 ms 31552 KB 
import java.util.*;
import java.io.*;
public class mecho {
    public static void main(String[] args) throws IOException {
        Reader in = new Reader();
        PrintWriter out = new PrintWriter(System.out);
        
        int N = in.nextInt(), K = in.nextInt();
        char[][] mat = new char[N][N];
        for (int i = 0; i < N; i++) {
            mat[i] = in.next().toCharArray();
        }
        Queue<int[]> q = new LinkedList<>();
        int[][] bee = new int[N][N];
        int[] start = new int[2], end = new int[2];
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < N; j++) {
                if (mat[i][j] == 'H') {
                    bee[i][j] = 0;
                    q.offer(new int[]{i, j});
                } else {
                    bee[i][j] = -1;
                }
                if (mat[i][j] == 'M') {
                    start = new int[]{i, j};
                }
                if (mat[i][j] == 'D') {
                    end = new int[]{i, j};
                }
            }
        }
        int[] x = new int[]{-1, 1, 0, 0}, y = new int[]{0, 0, -1, 1};
        while (!q.isEmpty()) {
            int[] current = q.poll();
            int r = current[0], c = current[1];
            for (int k = 0; k < 4; k++) {
                int r2 = r + x[k], c2 = c + y[k];
                if (r2 >= 0 && r2 < N && c2 >= 0 && c2 < N) {
                    if (mat[r2][c2] != 'D' && mat[r2][c2] != 'T' && bee[r2][c2] == -1) {
                        bee[r2][c2] = bee[r][c] + 1;
                        q.offer(new int[]{r2, c2});
                    }
                }
            }
        }
        out.println(search(mat, bee, start, end, K, 0, bee[start[0]][start[1]] - 1));
        
        out.close();
    }
    public static int search(char[][] mat, int[][] bee, int[] start, int[] end, int K, int l, int r) {
        if (l > r) {
            return -1;
        }
        int mid = (l + r) / 2;
        if (check(mat, bee, start, end, K, mid)) {
            int m = search(mat, bee, start, end, K, mid + 1, r);
            if (m == -1) {
                return mid;
            }
            return m;
        }
        return search(mat, bee, start, end, K, l, mid - 1);
    }
    public static boolean check(char[][] mat, int[][] bee, int[] start, int[] end, int K, int eat) {
        int N = mat.length;
        int[][] dist = new int[N][N];
        for (int i = 0; i < N; i++) {
            Arrays.fill(dist[i], -1);
        }
        dist[start[0]][start[1]] = 0;
        Queue<int[]> q = new LinkedList<>();
        q.offer(start);
        int[] x = new int[]{-1, 1, 0, 0}, y = new int[]{0, 0, -1, 1};
        while (!q.isEmpty()) {
            int[] current = q.poll();
            int r = current[0], c = current[1];
            for (int k = 0; k < 4; k++) {
                int r2 = r + x[k], c2 = c + y[k];
                if (r2 >= 0 && r2 < N && c2 >= 0 && c2 < N) {
                    if (mat[r2][c2] != 'T' && mat[r2][c2] != 'H' && dist[r2][c2] == -1) {
                        if (bee[r2][c2] == -1 || (dist[r][c] + 1) / K + eat < bee[r2][c2]) {
                            dist[r2][c2] = dist[r][c] + 1;
                            q.offer(new int[]{r2, c2});
                        }
                    }
                }
            }
        }
        return dist[end[0]][end[1]] >= 0;
    }
    static class Reader {
        BufferedInputStream in;
        public Reader() {
            in = new BufferedInputStream(System.in);
        }
        public String nextLine() throws IOException {
            int c;
            StringBuilder sb = new StringBuilder("");
            while ((c = in.read()) != '\n')
                sb.append((char)(c));
            return sb.toString();
        }
        public String next() throws IOException {
            int c;
            StringBuilder sb = new StringBuilder("");
            while ((c = in.read()) != ' ' && c != '\n')
                sb.append((char)(c));
            return sb.toString();
        }
        public int nextInt() throws IOException {
            return (int)nextLong();
        }
        public long nextLong() throws IOException {
            int c;
            long res = 0;
            boolean start = false, negative = false;
            while ((c = in.read()) != ' ' && c != '\n' || !start)
                if (c >= '0' && c <= '9' || c == '-') {
                    start = true;
                    if (c == '-')
                        negative = true;
                    else
                        res = res * 10 + c - '0';
                }
            return res * (negative ? -1 : 1);
        }
    }
    public static void sort(int[] arr) {
        List<Integer> list = new ArrayList<>();
        for (int i : arr) {
            list.add(i);
        }
        Collections.sort(list);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = list.get(i);
        }
    }
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 8448 KB Output is correct
2 Correct 62 ms 8456 KB Output is correct
3 Correct 60 ms 8168 KB Output is correct
4 Correct 65 ms 8504 KB Output is correct
5 Correct 63 ms 8208 KB Output is correct
6 Correct 63 ms 8252 KB Output is correct
7 Correct 566 ms 29088 KB Output is correct
8 Correct 65 ms 8220 KB Output is correct
9 Correct 74 ms 8200 KB Output is correct
10 Correct 62 ms 8324 KB Output is correct
11 Correct 67 ms 8300 KB Output is correct
12 Correct 78 ms 8396 KB Output is correct
13 Correct 82 ms 8272 KB Output is correct
14 Correct 140 ms 11276 KB Output is correct
15 Correct 67 ms 8292 KB Output is correct
16 Correct 68 ms 8344 KB Output is correct
17 Correct 67 ms 8444 KB Output is correct
18 Correct 69 ms 8360 KB Output is correct
19 Correct 62 ms 8232 KB Output is correct
20 Correct 77 ms 8204 KB Output is correct
21 Correct 80 ms 8384 KB Output is correct
22 Correct 77 ms 8536 KB Output is correct
23 Correct 76 ms 8700 KB Output is correct
24 Correct 97 ms 11200 KB Output is correct
25 Correct 100 ms 11312 KB Output is correct
26 Correct 104 ms 11384 KB Output is correct
27 Correct 109 ms 11244 KB Output is correct
28 Correct 103 ms 11416 KB Output is correct
29 Correct 108 ms 11308 KB Output is correct
30 Correct 107 ms 11176 KB Output is correct
31 Correct 127 ms 11528 KB Output is correct
32 Correct 116 ms 11552 KB Output is correct
33 Correct 253 ms 15492 KB Output is correct
34 Correct 260 ms 15340 KB Output is correct
35 Correct 313 ms 18180 KB Output is correct
36 Correct 262 ms 16316 KB Output is correct
37 Correct 282 ms 15628 KB Output is correct
38 Correct 361 ms 19184 KB Output is correct
39 Correct 305 ms 17676 KB Output is correct
40 Correct 239 ms 18352 KB Output is correct
41 Correct 395 ms 19264 KB Output is correct
42 Correct 320 ms 19012 KB Output is correct
43 Correct 250 ms 18336 KB Output is correct
44 Correct 465 ms 19532 KB Output is correct
45 Correct 298 ms 19480 KB Output is correct
46 Correct 321 ms 20948 KB Output is correct
47 Correct 404 ms 21092 KB Output is correct
48 Correct 354 ms 19324 KB Output is correct
49 Correct 268 ms 21440 KB Output is correct
50 Correct 504 ms 21252 KB Output is correct
51 Correct 287 ms 22984 KB Output is correct
52 Correct 319 ms 23120 KB Output is correct
53 Correct 459 ms 24256 KB Output is correct
54 Correct 331 ms 25720 KB Output is correct
55 Correct 297 ms 24740 KB Output is correct
56 Correct 525 ms 24576 KB Output is correct
57 Correct 367 ms 26828 KB Output is correct
58 Correct 337 ms 26516 KB Output is correct
59 Correct 550 ms 26416 KB Output is correct
60 Correct 350 ms 28180 KB Output is correct
61 Correct 350 ms 28144 KB Output is correct
62 Correct 650 ms 28556 KB Output is correct
63 Correct 651 ms 27804 KB Output is correct
64 Correct 740 ms 28584 KB Output is correct
65 Correct 732 ms 28408 KB Output is correct
66 Correct 663 ms 27836 KB Output is correct
67 Correct 607 ms 28452 KB Output is correct
68 Correct 452 ms 29284 KB Output is correct
69 Correct 438 ms 30140 KB Output is correct
70 Correct 446 ms 28884 KB Output is correct
71 Correct 450 ms 24184 KB Output is correct
72 Correct 367 ms 26588 KB Output is correct
73 Correct 425 ms 25616 KB Output is correct
74 Correct 496 ms 28984 KB Output is correct
75 Correct 503 ms 28428 KB Output is correct
76 Correct 527 ms 28580 KB Output is correct
77 Correct 550 ms 28536 KB Output is correct
78 Correct 495 ms 28584 KB Output is correct
79 Correct 510 ms 29696 KB Output is correct
80 Correct 498 ms 28404 KB Output is correct
81 Correct 499 ms 28420 KB Output is correct
82 Correct 577 ms 29676 KB Output is correct
83 Correct 563 ms 28796 KB Output is correct
84 Correct 496 ms 28568 KB Output is correct
85 Correct 484 ms 28796 KB Output is correct
86 Correct 500 ms 28236 KB Output is correct
87 Correct 485 ms 28688 KB Output is correct
88 Correct 566 ms 30988 KB Output is correct
89 Correct 546 ms 30900 KB Output is correct
90 Correct 557 ms 31552 KB Output is correct
91 Correct 552 ms 30948 KB Output is correct
92 Correct 561 ms 31480 KB Output is correct