Submission #320514

# Submission time Handle Problem Language Result Execution time Memory
320514 2020-11-09T02:29:36 Z anishrajeev Mecho (IOI09_mecho) Java 11
14 / 100
980 ms 65568 KB
import java.io.*;
import java.util.*;

public class mecho {
    public static void main(String[] args) throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        //BufferedReader bf = new BufferedReader(new FileReader("tester.in"));
        PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
        StringTokenizer stk = new StringTokenizer(bf.readLine());
        int N = Integer.parseInt(stk.nextToken());
        int S = Integer.parseInt(stk.nextToken());
        String[][] grid = new String[N][N];
        LinkedList<pair> list = new LinkedList<>();
        int[][] bees = new int[N][N];
        int startx = 0, starty = 0, homex = 0, homey = 0;
        for(int i = 0; i < N; i++){
            String line = bf.readLine();
            String[] str = line.split("");
            Arrays.fill(bees[i], Integer.MAX_VALUE);
            for(int c = 0; c < N; c++){
                grid[i][c] = str[c];
                if(grid[i][c].equals("H")){
                    list.add(new pair(i, c, 0));
                    bees[i][c] = 0;
                }
                if(grid[i][c].equals("M")){
                    startx = i;
                    starty = c;
                }
                if(grid[i][c].equals("D")){
                    homex = i;
                    homey = c;
                }
            }
        }
        int[] dx = new int[]{0, 1, 0, -1};
        int[] dy = new int[]{1, 0, -1, 0};
        boolean[][] visited = new boolean[N][N];
        int counter = 0;
        while(!list.isEmpty()){
            pair p = list.pop();
            if(p.x == homex && p.y == homey)continue;
            if(grid[p.x][p.y].equals("T"))continue;
            bees[p.x][p.y] = Math.min(bees[p.x][p.y], p.t+S);
            if(visited[p.x][p.y])continue;
            visited[p.x][p.y] = true;
            for(int i = 0; i < 4; i++){
                int nx = p.x+dx[i];
                int ny = p.y+dy[i];
                if(N <= nx || nx < 0 || N <= ny || ny < 0)continue;
                list.add(new pair(nx, ny, bees[p.x][p.y]));
            }
            counter++;
        }
        bees[homex][homey] = Integer.MAX_VALUE;
        int start = 0, end = 10000000;
        while(start != end){
            int mid = (start+end+1)/2;
            if(verify(bees, grid, mid, startx, starty, homex, homey, N, S))start = mid;
            else end = mid-1;
        }
        System.out.println(start);
    }
    public static boolean verify(int[][] bees, String[][] grid, int time, int startx, int starty, int homex, int homey, int N, int S){
        Stack<pair> stack = new Stack<>();
        stack.push(new pair(startx, starty, time*S));
        int[] dx = new int[]{0, 1, 0, -1};
        int[] dy = new int[]{1, 0, -1, 0};
        int max = 0;
        for(int i = 0; i < N; i++){
            for(int c = 0; c < N; c++){
                if(bees[i][c]!=Integer.MAX_VALUE)max = Math.max(max, bees[i][c]);
            }
        }
        boolean[][][] visited = new boolean[N][N][max];
        while(!stack.isEmpty()){
            pair p = stack.pop();
            if(p.t >= max || visited[p.x][p.y][p.t])continue;
            visited[p.x][p.y][p.t] = true;
            for(int i = 0; i < 4; i++){
                int nx = p.x+dx[i];
                int ny = p.y+dy[i];
                if(N <= nx || nx < 0 || N <= ny || ny < 0)continue;
                if(bees[nx][ny] <= p.t)continue;
                if(grid[nx][ny].equals("T")||grid[nx][ny].equals("H"))continue;
                if(bees[nx][ny] <= p.t+1)continue;
                stack.push(new pair(nx, ny, p.t+1));
            }
        }
        for(int i = 0; i < max; i++){
            if(visited[homex][homey][i])return true;
        }
        return false;
    }
    public static class pair{
        int x, y, t;
        public pair(int a, int b, int c){
            x = a;
            y = b;
            t = c;
        }
    }
}
# Verdict Execution time Memory Grader output
1 Incorrect 86 ms 12292 KB Output isn't correct
2 Correct 82 ms 11440 KB Output is correct
3 Incorrect 89 ms 11572 KB Output isn't correct
4 Incorrect 92 ms 11748 KB Output isn't correct
5 Correct 81 ms 11620 KB Output is correct
6 Correct 87 ms 11696 KB Output is correct
7 Runtime error 888 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
8 Incorrect 88 ms 11700 KB Output isn't correct
9 Correct 108 ms 12600 KB Output is correct
10 Correct 96 ms 11976 KB Output is correct
11 Correct 95 ms 11988 KB Output is correct
12 Incorrect 162 ms 34008 KB Output isn't correct
13 Incorrect 201 ms 23912 KB Output isn't correct
14 Incorrect 325 ms 42128 KB Output isn't correct
15 Correct 103 ms 13816 KB Output is correct
16 Correct 116 ms 21276 KB Output is correct
17 Correct 150 ms 17376 KB Output is correct
18 Correct 217 ms 39292 KB Output is correct
19 Correct 142 ms 21964 KB Output is correct
20 Correct 248 ms 59372 KB Output is correct
21 Correct 209 ms 38360 KB Output is correct
22 Runtime error 184 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
23 Runtime error 300 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
24 Runtime error 183 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
25 Runtime error 206 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
26 Runtime error 184 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
27 Runtime error 213 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
28 Runtime error 194 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
29 Runtime error 217 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
30 Runtime error 207 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
31 Runtime error 208 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Runtime error 200 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
33 Runtime error 709 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
34 Runtime error 619 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
35 Runtime error 732 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
36 Runtime error 749 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
37 Runtime error 660 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
38 Runtime error 716 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
39 Runtime error 783 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
40 Runtime error 788 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
41 Runtime error 885 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
42 Runtime error 828 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
43 Runtime error 798 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
44 Runtime error 971 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
45 Runtime error 793 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
46 Runtime error 817 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
47 Runtime error 980 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
48 Runtime error 914 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
49 Runtime error 891 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
50 Runtime error 892 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
51 Runtime error 887 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
52 Runtime error 746 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
53 Runtime error 860 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
54 Runtime error 724 ms 65568 KB Execution killed with signal 9 (could be triggered by violating memory limits)
55 Runtime error 765 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
56 Runtime error 788 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
57 Runtime error 804 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
58 Runtime error 642 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
59 Runtime error 846 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
60 Runtime error 748 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
61 Runtime error 853 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
62 Runtime error 785 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
63 Runtime error 811 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
64 Runtime error 761 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
65 Runtime error 750 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
66 Runtime error 714 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
67 Runtime error 785 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
68 Runtime error 739 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
69 Runtime error 620 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
70 Runtime error 793 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
71 Runtime error 736 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
72 Runtime error 789 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
73 Runtime error 800 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
74 Runtime error 672 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
75 Runtime error 837 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
76 Runtime error 685 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
77 Runtime error 807 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
78 Runtime error 674 ms 65556 KB Execution killed with signal 9 (could be triggered by violating memory limits)
79 Runtime error 702 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
80 Runtime error 821 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
81 Runtime error 788 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
82 Runtime error 799 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
83 Runtime error 831 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
84 Runtime error 853 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
85 Runtime error 837 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
86 Runtime error 738 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)
87 Runtime error 808 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
88 Runtime error 776 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
89 Runtime error 765 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
90 Runtime error 800 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
91 Runtime error 821 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
92 Runtime error 795 ms 65544 KB Execution killed with signal 9 (could be triggered by violating memory limits)