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Submission #135951

# Submission time Handle Problem Language Result Execution time Memory
135951 2019-07-24T14:21:47 Z Dilshod_Imomov Mecho (IOI09_mecho) C++17
100 / 100
 266 ms 6392 KB 
# include <bits/stdc++.h>
# define ll long long
# define fi first
# define se second
# define pb push_back
# define pf push_front
# define For(i, a, b) for( int i = a; i < b; i++ )
# define in insert
# define all(a) a.begin(),a.end()
# define pi pair < int, int >
# define DEBUG
# define readfile(file) freopen ( (file + ".in").c_str(), "r", stdin)
# define writefile(file) freopen ( (file + ".out").c_str(), "w", stdout)
# define speed ios_base::sync_with_stdio(false);cin.tie(NULL)
# define LARGE 1000
# define SET(file) readfile(file);writefile(file);

using namespace std;

int ax[4] = { 1, -1, 0, 0 };
int ay[4] = { 0, 0, 1, -1 };

char mainMap[LARGE][LARGE];
bool visited[LARGE][LARGE];
int beeDistance[LARGE][LARGE];

int n, s;
int dx, dy;
int mx, my;

bool valid( int i, int j )
{
    if ( i >= 0 && i < n && j >= 0 && j < n && mainMap[i][j] != 'T' )
        return 1;
    return 0;
}

bool test( int delay )
{
    if ( delay * s >= beeDistance[mx][my] )
        return false;

    memset(visited, 0, sizeof(visited));
    queue < pair < int, pi > > q;
    q.push({delay * s, {mx, my}});
    visited[mx][my] = true;

    while (!q.empty())
    {
        int distance = q.front().fi;
        int x = q.front().se.fi;
        int y = q.front().se.se;

        q.pop();

        if ( mainMap[x][y] == 'D' )
            return true;

        For ( i, 0, 4)
        {
            int nx = x + ax[i];
            int ny = y + ay[i];

            if (nx < 0 || nx >= n || ny < 0 || ny >= n || mainMap[nx][ny] == 'T' || (distance + 1) >= beeDistance[nx][ny] || visited[nx][ny])
                continue;

            q.push({distance + 1, {nx, ny}});
            visited[nx][ny] = true;
        }
    }
    return false;
}

int main()
{
    /// Author: _Dilshod_
    speed;
    cin >> n >> s;

    queue < pi > bq;
    memset(beeDistance, -1, sizeof(beeDistance));

    For ( i, 0, n )
    {
        For ( j, 0, n )
        {
            cin >> mainMap[i][j];

            if ( mainMap[i][j] == 'D' )
            {
                dx = i;
                dy = j;
            } else if ( mainMap[i][j] == 'H' )
            {
                bq.push({i, j});
                beeDistance[i][j] = 0;
            } else if ( mainMap[i][j] == 'M' )
            {
                mx = i;
                my = j;
                mainMap[i][j] = 'G';
            }
        }
    }
    while( !bq.empty() )
    {
        int x = bq.front().fi;
        int y = bq.front().se;

        bq.pop();

        For ( i, 0, 4 )
        {
            int nx = x + ax[i];
            int ny = y + ay[i];
            if (nx < 0 || nx >= n || ny < 0 || ny >= n || mainMap[nx][ny] != 'G' || beeDistance[nx][ny] != -1)
                continue;
            beeDistance[nx][ny] = beeDistance[x][y] + s;
            bq.push({nx, ny});
        }
    }
    beeDistance[dx][dy] = n * n * s;
    int l = -1, r = 2 * n * n, m;
    while (r - l > 1 )
    {
        m = (l + r) >> 1;
        if ( test(m) ) l = m;
        else r = m;
    }
    cout << l;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5240 KB Output is correct
2 Correct 6 ms 5240 KB Output is correct
3 Correct 6 ms 5240 KB Output is correct
4 Correct 6 ms 5240 KB Output is correct
5 Correct 6 ms 5240 KB Output is correct
6 Correct 6 ms 5240 KB Output is correct
7 Correct 112 ms 6136 KB Output is correct
8 Correct 6 ms 5240 KB Output is correct
9 Correct 6 ms 5240 KB Output is correct
10 Correct 6 ms 5240 KB Output is correct
11 Correct 6 ms 5240 KB Output is correct
12 Correct 6 ms 5368 KB Output is correct
13 Correct 6 ms 5240 KB Output is correct
14 Correct 7 ms 5372 KB Output is correct
15 Correct 6 ms 5212 KB Output is correct
16 Correct 6 ms 5240 KB Output is correct
17 Correct 7 ms 5240 KB Output is correct
18 Correct 7 ms 5240 KB Output is correct
19 Correct 6 ms 5240 KB Output is correct
20 Correct 6 ms 5240 KB Output is correct
21 Correct 6 ms 5308 KB Output is correct
22 Correct 6 ms 5240 KB Output is correct
23 Correct 6 ms 5288 KB Output is correct
24 Correct 8 ms 5240 KB Output is correct
25 Correct 6 ms 5240 KB Output is correct
26 Correct 7 ms 5368 KB Output is correct
27 Correct 6 ms 5240 KB Output is correct
28 Correct 7 ms 5240 KB Output is correct
29 Correct 7 ms 5368 KB Output is correct
30 Correct 7 ms 5368 KB Output is correct
31 Correct 7 ms 5240 KB Output is correct
32 Correct 7 ms 5244 KB Output is correct
33 Correct 12 ms 5496 KB Output is correct
34 Correct 12 ms 5624 KB Output is correct
35 Correct 29 ms 5624 KB Output is correct
36 Correct 11 ms 5624 KB Output is correct
37 Correct 12 ms 5624 KB Output is correct
38 Correct 37 ms 5624 KB Output is correct
39 Correct 13 ms 5752 KB Output is correct
40 Correct 13 ms 5752 KB Output is correct
41 Correct 47 ms 5728 KB Output is correct
42 Correct 14 ms 5752 KB Output is correct
43 Correct 14 ms 5752 KB Output is correct
44 Correct 59 ms 5752 KB Output is correct
45 Correct 15 ms 5752 KB Output is correct
46 Correct 15 ms 5752 KB Output is correct
47 Correct 70 ms 5752 KB Output is correct
48 Correct 17 ms 5752 KB Output is correct
49 Correct 17 ms 5752 KB Output is correct
50 Correct 83 ms 5880 KB Output is correct
51 Correct 19 ms 5876 KB Output is correct
52 Correct 20 ms 5880 KB Output is correct
53 Correct 107 ms 6008 KB Output is correct
54 Correct 21 ms 5880 KB Output is correct
55 Correct 21 ms 5880 KB Output is correct
56 Correct 125 ms 5980 KB Output is correct
57 Correct 23 ms 6008 KB Output is correct
58 Correct 23 ms 5880 KB Output is correct
59 Correct 138 ms 6136 KB Output is correct
60 Correct 25 ms 6008 KB Output is correct
61 Correct 25 ms 6008 KB Output is correct
62 Correct 161 ms 6140 KB Output is correct
63 Correct 127 ms 6008 KB Output is correct
64 Correct 266 ms 6136 KB Output is correct
65 Correct 185 ms 6124 KB Output is correct
66 Correct 151 ms 6064 KB Output is correct
67 Correct 149 ms 6060 KB Output is correct
68 Correct 60 ms 6008 KB Output is correct
69 Correct 59 ms 6008 KB Output is correct
70 Correct 49 ms 6040 KB Output is correct
71 Correct 54 ms 6008 KB Output is correct
72 Correct 46 ms 6096 KB Output is correct
73 Correct 45 ms 6264 KB Output is correct
74 Correct 76 ms 6260 KB Output is correct
75 Correct 89 ms 6264 KB Output is correct
76 Correct 82 ms 6356 KB Output is correct
77 Correct 80 ms 6264 KB Output is correct
78 Correct 102 ms 6264 KB Output is correct
79 Correct 66 ms 6236 KB Output is correct
80 Correct 78 ms 6264 KB Output is correct
81 Correct 91 ms 6264 KB Output is correct
82 Correct 79 ms 6392 KB Output is correct
83 Correct 101 ms 6264 KB Output is correct
84 Correct 97 ms 6272 KB Output is correct
85 Correct 104 ms 6268 KB Output is correct
86 Correct 99 ms 6264 KB Output is correct
87 Correct 104 ms 6264 KB Output is correct
88 Correct 110 ms 6116 KB Output is correct
89 Correct 111 ms 6136 KB Output is correct
90 Correct 109 ms 6184 KB Output is correct
91 Correct 110 ms 6316 KB Output is correct
92 Correct 121 ms 6136 KB Output is correct