oj.uz

Submission #886626

# Submission time Handle Problem Language Result Execution time Memory
886626 2023-12-12T12:59:19 Z gnu Mecho (IOI09_mecho) C++17
23 / 100
 175 ms 11872 KB 
#include <bits/stdc++.h>
using namespace std;
int n, S;
vector<string> board;
vector<vector<int>> vis;
vector<int> dx = {1, 0, -1, 0};
vector<int> dy = {0, 1, 0, -1};
struct point{
    int i, j;
    point(int i, int j) {
        this->i = i;
        this->j = j;
    }
};
void solve()
{
    cin >> n >> S;
    board = vector<string>(n);
    vis = vector<vector<int>> (n, vector<int> (n));
    for (int i = 0; i < n; ++i) cin >> board[i];
    point mecho(0,0), home(0,0);
    vector<point> honey;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (board[i][j] == 'H') honey.emplace_back(i, j);
            else if (board[i][j] == 'M') mecho = {i, j};
            else if (board[i][j] == 'D') home = {i, j};
        }
    }
    queue<point> mq;
    vector<vector<int>> dist(n, vector<int> (n, 0   ));
    for (auto x : honey) {
        mq.push(x);
        vis[x.i][x.j] = 1;
    }
    while (!mq.empty()) {
        point u = mq.front();
        mq.pop();
        for (int i = 0; i < 4; ++i) {
            if (u.i + dx[i] < 0 || u.i + dx[i] >= n || u.j + dy[i] < 0 || u.j + dy[i] >= n || vis[u.i+dx[i]][u.j+dy[i]] || (board[u.i+dx[i]][u.j+dy[i]] != 'G' && board[u.i+dx[i]][u.j+dy[i]] != 'M')) continue;
            mq.emplace(u.i + dx[i], u.j + dy[i]);
            vis[u.i + dx[i]][u.j + dy[i]] = 1;
            dist[u.i + dx[i]][u.j + dy[i]] = dist[u.i][u.j] + 1;
        }
    }
    //    for (auto &x : dist)
    //    {
    //        for (auto y : x) cout << y << ' ';
    //        cout << '\n';
    //    }

    int l = 0, r = 1e9;
    //    return;
    while (l <= r) {
        vector<vector<int>> md(n, vector<int> (n));
        int m = (l + r) / 2;
        vis = vector<vector<int>> (n, vector<int> (n));
        queue<point> q;
        q.emplace(mecho.i, mecho.j);
        vis[mecho.i][mecho.j] = 1;
        if (m >= dist[mecho.i][mecho.j]) q.pop();
        while (!q.empty()) {
            point u = q.front();

            q.pop();
            for (int i = 0; i < 4; ++i) {
                int ni = u.i + dx[i], nj = u.j + dy[i];
                if (u.i + dx[i] < 0 || u.i + dx[i] >= n || u.j + dy[i] < 0 || u.j + dy[i] >= n || vis[u.i+dx[i]][u.j+dy[i]] || (board[u.i+dx[i]][u.j+dy[i]] != 'G' && board[u.i+dx[i]][u.j+dy[i]] != 'M')) continue;
                if (((md[u.i][u.j]+1) / S >= (dist[u.i][u.j] - m))) continue;
                q.emplace(ni, nj);
                md[ni][nj] = md[u.i][u.j] + 1;
                vis[ni][nj] = 1;
            }
        }
        bool ok = false;
        for (int i = 0; i < 4; ++i) {
            point u = home;
            if (u.i + dx[i] < 0 || u.i + dx[i] >= n || u.j + dy[i] < 0 || u.j + dy[i] >= n || (board[u.i+dx[i]][u.j+dy[i]] != 'G' && board[u.i+dx[i]][u.j+dy[i]] != 'M')) continue;
            if (((md[u.i][u.j]) / S >= (dist[u.i + dx[i]][u.j + dy[i]] - m))) continue;
            if (vis[home.i + dx[i]][home.j+dy[i]]) ok = true;
        }
        if (ok) {
            l = m+1;
        } else r = m-1;

    }
    cout << l-1;

}

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    solve();
}

Subtask #1
23.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Correct 0 ms 348 KB Output is correct
6 Incorrect 0 ms 348 KB Output isn't correct
7 Incorrect 96 ms 11304 KB Output isn't correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Incorrect 0 ms 348 KB Output isn't correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Correct 0 ms 348 KB Output is correct
17 Incorrect 0 ms 348 KB Output isn't correct
18 Correct 0 ms 348 KB Output is correct
19 Incorrect 0 ms 348 KB Output isn't correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 1 ms 344 KB Output isn't correct
22 Correct 0 ms 348 KB Output is correct
23 Incorrect 0 ms 348 KB Output isn't correct
24 Correct 0 ms 348 KB Output is correct
25 Incorrect 1 ms 348 KB Output isn't correct
26 Correct 1 ms 348 KB Output is correct
27 Incorrect 1 ms 348 KB Output isn't correct
28 Correct 0 ms 348 KB Output is correct
29 Incorrect 1 ms 348 KB Output isn't correct
30 Correct 1 ms 348 KB Output is correct
31 Incorrect 1 ms 348 KB Output isn't correct
32 Correct 1 ms 348 KB Output is correct
33 Incorrect 10 ms 2584 KB Output isn't correct
34 Correct 7 ms 2548 KB Output is correct
35 Incorrect 20 ms 2560 KB Output isn't correct
36 Incorrect 7 ms 3416 KB Output isn't correct
37 Correct 7 ms 3040 KB Output is correct
38 Incorrect 27 ms 3164 KB Output isn't correct
39 Incorrect 9 ms 3900 KB Output isn't correct
40 Correct 10 ms 3884 KB Output is correct
41 Incorrect 33 ms 3912 KB Output isn't correct
42 Incorrect 10 ms 4720 KB Output isn't correct
43 Correct 10 ms 4712 KB Output is correct
44 Incorrect 44 ms 4740 KB Output isn't correct
45 Incorrect 16 ms 5576 KB Output isn't correct
46 Correct 13 ms 5596 KB Output is correct
47 Incorrect 54 ms 5652 KB Output isn't correct
48 Incorrect 16 ms 6608 KB Output isn't correct
49 Correct 16 ms 6588 KB Output is correct
50 Incorrect 68 ms 6608 KB Output isn't correct
51 Incorrect 18 ms 7668 KB Output isn't correct
52 Correct 20 ms 7512 KB Output is correct
53 Incorrect 77 ms 7608 KB Output isn't correct
54 Incorrect 22 ms 8808 KB Output isn't correct
55 Correct 24 ms 8784 KB Output is correct
56 Incorrect 91 ms 8784 KB Output isn't correct
57 Incorrect 22 ms 9980 KB Output isn't correct
58 Correct 23 ms 10016 KB Output is correct
59 Incorrect 106 ms 10012 KB Output isn't correct
60 Incorrect 26 ms 11324 KB Output isn't correct
61 Correct 38 ms 11300 KB Output is correct
62 Incorrect 129 ms 11324 KB Output isn't correct
63 Incorrect 92 ms 11324 KB Output isn't correct
64 Incorrect 174 ms 11312 KB Output isn't correct
65 Correct 175 ms 11380 KB Output is correct
66 Correct 118 ms 11324 KB Output is correct
67 Correct 107 ms 11320 KB Output is correct
68 Correct 63 ms 11368 KB Output is correct
69 Incorrect 62 ms 11348 KB Output isn't correct
70 Correct 49 ms 11344 KB Output is correct
71 Correct 51 ms 11404 KB Output is correct
72 Correct 48 ms 11388 KB Output is correct
73 Correct 51 ms 11448 KB Output is correct
74 Incorrect 82 ms 11436 KB Output isn't correct
75 Incorrect 73 ms 11412 KB Output isn't correct
76 Incorrect 73 ms 11400 KB Output isn't correct
77 Incorrect 71 ms 11380 KB Output isn't correct
78 Correct 77 ms 11348 KB Output is correct
79 Incorrect 67 ms 11376 KB Output isn't correct
80 Incorrect 69 ms 11468 KB Output isn't correct
81 Incorrect 77 ms 11284 KB Output isn't correct
82 Incorrect 68 ms 11376 KB Output isn't correct
83 Incorrect 88 ms 11432 KB Output isn't correct
84 Incorrect 86 ms 11444 KB Output isn't correct
85 Incorrect 78 ms 11376 KB Output isn't correct
86 Incorrect 84 ms 11352 KB Output isn't correct
87 Incorrect 81 ms 11384 KB Output isn't correct
88 Incorrect 92 ms 11376 KB Output isn't correct
89 Incorrect 100 ms 11872 KB Output isn't correct
90 Incorrect 90 ms 11416 KB Output isn't correct
91 Incorrect 88 ms 11336 KB Output isn't correct
92 Incorrect 89 ms 11384 KB Output isn't correct