oj.uz

Submission #535627

# Submission time Handle Problem Language Result Execution time Memory
535627 2022-03-10T17:01:01 Z louiskwok Mecho (IOI09_mecho) C++17
4 / 100
 235 ms 9380 KB 
#include <bits/stdc++.h>
using namespace std;
bool visited[805][805];
int distBee[805][805];
double distBear[805][805];
char g[805][805];
int dr[] = {-1,0,1,0};
int dc[] = {0,1,0,-1};
int n,sr,sc,er,ec,mxtime;
double s;
bool success;
bool possible(double t) {
    memset(visited,0,sizeof visited);
    queue < pair<int,int> > bfs;
    distBear[sr][sc] = t;
    bfs.push({sr,sc});
    while (!bfs.empty()) {
        int curR = bfs.front().first;
        int curC = bfs.front().second;
        bfs.pop();
        for (int i=0;i<4;i++) {
            int nr = curR + dr[i];
            int nc = curC + dc[i];
            if (nr<1||nr>n||nc<1||nc>n||visited[nr][nc]||g[nr][nc]=='T'||distBear[curR][curC]+(double)1/s>=(double)distBee[nr][nc]) continue;
            visited[nr][nc] = true;
            distBear[nr][nc] = distBear[curR][curC]+1/s;
            bfs.push({nr,nc});
        }
    }
    if (visited[er][ec]) {
        success = true;
        return true;
    }
    return false;
}
int main() {
    queue < pair<int,int> > bfs;
    cin >> n >> s;
    for (int i=1;i<=n;i++) {
        for (int j=1;j<=n;j++) {
            cin >> g[i][j];
            if (g[i][j]=='M') sr = i,sc = j;
            else if (g[i][j]=='D') er = i,ec = j;
            else if (g[i][j]=='H') {
                visited[i][j] = true;
                bfs.push({i,j});
            }
        }
    }
    while (!bfs.empty()) {
        int curR = bfs.front().first;
        int curC = bfs.front().second;
        bfs.pop();
        for (int i=0;i<4;i++) {
            int nr = curR + dr[i];
            int nc = curC + dc[i];
            if (nr<1||nr>n||nc<1||nc>n||visited[nr][nc]||g[nr][nc]=='T'||g[nr][nc]=='D') continue;
            visited[nr][nc] = true;
            distBee[nr][nc] = distBee[curR][curC]+1;
            if (g[nr][nc]=='M') continue;
            bfs.push({nr,nc});
        }
    }
    int lo = 0,hi = distBee[sr][sc]-1;
    while (lo<hi) {
        int mid = (lo+hi+1)/2;
        if (possible((double)mid)) lo = mid;
        else hi = mid-1;
    }
    if (!possible(0)) cout << -1 << endl;
    else cout << lo << endl;
    return 0;
}

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 852 KB Output isn't correct
2 Incorrect 1 ms 980 KB Output isn't correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Incorrect 1 ms 980 KB Output isn't correct
5 Incorrect 1 ms 1108 KB Output isn't correct
6 Incorrect 1 ms 980 KB Output isn't correct
7 Incorrect 117 ms 9192 KB Output isn't correct
8 Correct 1 ms 980 KB Output is correct
9 Incorrect 1 ms 980 KB Output isn't correct
10 Incorrect 1 ms 980 KB Output isn't correct
11 Incorrect 1 ms 980 KB Output isn't correct
12 Incorrect 1 ms 1364 KB Output isn't correct
13 Incorrect 1 ms 1236 KB Output isn't correct
14 Correct 1 ms 1236 KB Output is correct
15 Incorrect 1 ms 980 KB Output isn't correct
16 Incorrect 1 ms 1108 KB Output isn't correct
17 Incorrect 1 ms 1108 KB Output isn't correct
18 Incorrect 1 ms 1108 KB Output isn't correct
19 Incorrect 1 ms 1108 KB Output isn't correct
20 Incorrect 1 ms 1108 KB Output isn't correct
21 Incorrect 1 ms 1108 KB Output isn't correct
22 Incorrect 1 ms 1236 KB Output isn't correct
23 Incorrect 1 ms 1236 KB Output isn't correct
24 Incorrect 1 ms 1352 KB Output isn't correct
25 Incorrect 1 ms 1236 KB Output isn't correct
26 Incorrect 2 ms 1364 KB Output isn't correct
27 Incorrect 2 ms 1236 KB Output isn't correct
28 Incorrect 2 ms 1492 KB Output isn't correct
29 Incorrect 2 ms 1364 KB Output isn't correct
30 Incorrect 2 ms 1492 KB Output isn't correct
31 Incorrect 2 ms 1364 KB Output isn't correct
32 Incorrect 2 ms 1492 KB Output isn't correct
33 Incorrect 20 ms 3156 KB Output isn't correct
34 Incorrect 28 ms 4284 KB Output isn't correct
35 Incorrect 25 ms 4512 KB Output isn't correct
36 Incorrect 28 ms 3540 KB Output isn't correct
37 Incorrect 38 ms 4872 KB Output isn't correct
38 Incorrect 32 ms 4904 KB Output isn't correct
39 Incorrect 36 ms 3980 KB Output isn't correct
40 Incorrect 51 ms 5392 KB Output isn't correct
41 Incorrect 42 ms 5524 KB Output isn't correct
42 Incorrect 46 ms 4172 KB Output isn't correct
43 Incorrect 55 ms 5956 KB Output isn't correct
44 Incorrect 62 ms 6044 KB Output isn't correct
45 Incorrect 55 ms 4452 KB Output isn't correct
46 Incorrect 70 ms 6436 KB Output isn't correct
47 Incorrect 72 ms 6488 KB Output isn't correct
48 Incorrect 65 ms 4812 KB Output isn't correct
49 Incorrect 87 ms 6948 KB Output isn't correct
50 Incorrect 80 ms 6988 KB Output isn't correct
51 Incorrect 73 ms 5120 KB Output isn't correct
52 Incorrect 102 ms 7352 KB Output isn't correct
53 Incorrect 100 ms 7560 KB Output isn't correct
54 Incorrect 89 ms 5408 KB Output isn't correct
55 Incorrect 113 ms 7832 KB Output isn't correct
56 Incorrect 110 ms 8072 KB Output isn't correct
57 Incorrect 102 ms 5788 KB Output isn't correct
58 Incorrect 139 ms 8148 KB Output isn't correct
59 Incorrect 142 ms 8480 KB Output isn't correct
60 Incorrect 115 ms 6072 KB Output isn't correct
61 Incorrect 154 ms 8644 KB Output isn't correct
62 Incorrect 164 ms 9048 KB Output isn't correct
63 Incorrect 126 ms 8972 KB Output isn't correct
64 Incorrect 235 ms 9108 KB Output isn't correct
65 Incorrect 216 ms 9100 KB Output isn't correct
66 Incorrect 189 ms 9112 KB Output isn't correct
67 Correct 140 ms 8820 KB Output is correct
68 Incorrect 75 ms 8668 KB Output isn't correct
69 Incorrect 82 ms 8752 KB Output isn't correct
70 Incorrect 72 ms 8524 KB Output isn't correct
71 Incorrect 69 ms 8528 KB Output isn't correct
72 Incorrect 86 ms 8908 KB Output isn't correct
73 Incorrect 61 ms 9336 KB Output isn't correct
74 Incorrect 127 ms 9292 KB Output isn't correct
75 Incorrect 99 ms 9380 KB Output isn't correct
76 Incorrect 95 ms 9220 KB Output isn't correct
77 Incorrect 101 ms 9276 KB Output isn't correct
78 Correct 97 ms 6744 KB Output is correct
79 Incorrect 133 ms 9236 KB Output isn't correct
80 Incorrect 103 ms 6724 KB Output isn't correct
81 Incorrect 93 ms 6656 KB Output isn't correct
82 Incorrect 98 ms 6852 KB Output isn't correct
83 Incorrect 100 ms 6748 KB Output isn't correct
84 Incorrect 146 ms 9356 KB Output isn't correct
85 Incorrect 107 ms 6928 KB Output isn't correct
86 Incorrect 102 ms 6800 KB Output isn't correct
87 Incorrect 107 ms 7116 KB Output isn't correct
88 Incorrect 97 ms 6960 KB Output isn't correct
89 Incorrect 166 ms 9232 KB Output isn't correct
90 Incorrect 115 ms 8320 KB Output isn't correct
91 Incorrect 117 ms 9212 KB Output isn't correct
92 Incorrect 103 ms 7116 KB Output isn't correct