oj.uz

Submission #996988

# Submission time Handle Problem Language Result Execution time Memory
996988 2024-06-11T14:38:31 Z imann Mecho (IOI09_mecho) C++17
4 / 100
 129 ms 6508 KB 
#include <iostream>
#include <array>
#include <string>
#include <queue>

const int MAX_N = 800 + 1;
const int INF = 1e9;

std::array<std::string, MAX_N> grid;
std::array<std::array<int, MAX_N>, MAX_N> minuteToBeHive, level;

void bfs(int n) {
    std::queue<std::pair<int, int>> q;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            minuteToBeHive[i][j] = INF;
            if (grid[i][j] == 'H') {
                q.push({i, j});
                minuteToBeHive[i][j] = 0;
            }
        }
    }

    while (!q.empty()) {
        auto v = q.front();
        q.pop();
        if (v.first > 0) {
            if (grid[v.first - 1][v.second] == 'G' || grid[v.first - 1][v.second] == 'M') {
                if (minuteToBeHive[v.first - 1][v.second] == INF)
                    q.push({v.first - 1, v.second});
                minuteToBeHive[v.first - 1][v.second] = std::min(minuteToBeHive[v.first - 1][v.second], minuteToBeHive[v.first][v.second] + 1);
            }
        }
        if (v.first < n - 1) {
            if (grid[v.first + 1][v.second] == 'G' || grid[v.first + 1][v.second] == 'M') {
                if (minuteToBeHive[v.first + 1][v.second] == INF)
                    q.push({v.first + 1, v.second});
                minuteToBeHive[v.first + 1][v.second] = std::min(minuteToBeHive[v.first + 1][v.second], minuteToBeHive[v.first][v.second] + 1);
            }
        }
        if (v.second > 0) {
            if (grid[v.first][v.second - 1] == 'G' || grid[v.first][v.second - 1] == 'M') {
                if (minuteToBeHive[v.first][v.second - 1] == INF)
                    q.push({v.first, v.second - 1});
                minuteToBeHive[v.first][v.second - 1] = std::min(minuteToBeHive[v.first][v.second - 1], minuteToBeHive[v.first][v.second] + 1);
            }
        }
        if (v.second < n - 1) {
            if (grid[v.first][v.second + 1] == 'G' || grid[v.first][v.second + 1] == 'M') {
                if (minuteToBeHive[v.first][v.second + 1] == INF)
                    q.push({v.first, v.second + 1});
                minuteToBeHive[v.first][v.second + 1] = std::min(minuteToBeHive[v.first][v.second + 1], minuteToBeHive[v.first][v.second] + 1);
            }
        }
    }
}

bool bfs2(int n, int s, int startMinute) {
    std::pair<int, int> start, end;
    std::queue<std::pair<int, int>> q;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            level[i][j] = INF;
            if (grid[i][j] == 'M')
                start = {i, j};
            if (grid[i][j] == 'D')
                end = {i, j};
        }
    }
    q.push(start);
    level[start.first][start.second] = 0;
    if (startMinute + (level[start.first][start.second] + 1) / s > minuteToBeHive[start.first][start.second])
        return false;
    while (!q.empty()) {
        auto v = q.front();
        q.pop();
        if (v.first > 0) {
            if ((grid[v.first - 1][v.second] == 'G' || grid[v.first - 1][v.second] == 'D' || grid[v.first - 1][v.second] == 'M') && (startMinute + (level[v.first][v.second] + 1) / s <= minuteToBeHive[v.first - 1][v.second])) {
                if (level[v.first - 1][v.second] == INF)
                    q.push({v.first - 1, v.second});
                level[v.first - 1][v.second] = std::min(level[v.first - 1][v.second], level[v.first][v.second] + 1);
            }
        }
        if (v.first < n - 1) {
            if ((grid[v.first + 1][v.second] == 'G' || grid[v.first + 1][v.second] == 'D' || grid[v.first + 1][v.second] == 'M') && (startMinute + (level[v.first][v.second] + 1) / s <= minuteToBeHive[v.first + 1][v.second])) {
                if (level[v.first + 1][v.second] == INF)
                    q.push({v.first + 1, v.second});
                level[v.first + 1][v.second] = std::min(level[v.first + 1][v.second], level[v.first][v.second] + 1);
            }
        }
        if (v.second > 0) {
            if ((grid[v.first][v.second - 1] == 'G' || grid[v.first][v.second - 1] == 'D' || grid[v.first][v.second - 1] == 'M') && (startMinute + (level[v.first][v.second] + 1) / s <= minuteToBeHive[v.first][v.second - 1])) {
                if (level[v.first][v.second - 1] == INF)
                    q.push({v.first, v.second - 1});
                level[v.first][v.second - 1] = std::min(level[v.first][v.second - 1], level[v.first][v.second] + 1);
            }
        }
        if (v.second < n - 1) {
            if ((grid[v.first][v.second + 1] == 'G' || grid[v.first][v.second + 1] == 'D' || grid[v.first][v.second + 1] == 'M') && (startMinute + (level[v.first][v.second] + 1) / s <= minuteToBeHive[v.first][v.second + 1])) {
                if (level[v.first][v.second + 1] == INF)
                    q.push({v.first, v.second + 1});
                level[v.first][v.second + 1] = std::min(level[v.first][v.second + 1], level[v.first][v.second] + 1);
            }
        }
    }
    return level[end.first][end.second] != INF;
}

int solve(int n, int s) {
    bfs(n);
    int l = 0, r = n;
    while (r - l > 1) {
        int mid = (r + l) / 2;
        if (bfs2(n, s, mid)) {
            l = mid;
        } else {
            r = mid;
        }
    }

    if (bfs2(n, s, l))
        return l;
    return -1;
}

int main() {
    int n, s; std::cin >> n >> s;
    for (int i = 0; i < n; ++i) {
        std::cin >> grid[i];
    }
    std::cout << solve(n, s) << std::endl;
}

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 2392 KB Output isn't correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Incorrect 1 ms 2396 KB Output isn't correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Incorrect 0 ms 2396 KB Output isn't correct
6 Incorrect 0 ms 2396 KB Output isn't correct
7 Incorrect 68 ms 6236 KB Output isn't correct
8 Incorrect 1 ms 2396 KB Output isn't correct
9 Incorrect 0 ms 2396 KB Output isn't correct
10 Incorrect 1 ms 2396 KB Output isn't correct
11 Incorrect 1 ms 2396 KB Output isn't correct
12 Incorrect 1 ms 4700 KB Output isn't correct
13 Incorrect 1 ms 2652 KB Output isn't correct
14 Correct 1 ms 4700 KB Output is correct
15 Incorrect 0 ms 2396 KB Output isn't correct
16 Incorrect 0 ms 2396 KB Output isn't correct
17 Incorrect 0 ms 2396 KB Output isn't correct
18 Incorrect 1 ms 2396 KB Output isn't correct
19 Incorrect 0 ms 2396 KB Output isn't correct
20 Incorrect 1 ms 2392 KB Output isn't correct
21 Incorrect 1 ms 2396 KB Output isn't correct
22 Incorrect 1 ms 2396 KB Output isn't correct
23 Incorrect 1 ms 2652 KB Output isn't correct
24 Incorrect 1 ms 2652 KB Output isn't correct
25 Incorrect 1 ms 4700 KB Output isn't correct
26 Incorrect 1 ms 4700 KB Output isn't correct
27 Incorrect 1 ms 4700 KB Output isn't correct
28 Incorrect 1 ms 4696 KB Output isn't correct
29 Incorrect 1 ms 4700 KB Output isn't correct
30 Incorrect 1 ms 4696 KB Output isn't correct
31 Incorrect 1 ms 4696 KB Output isn't correct
32 Incorrect 1 ms 4700 KB Output isn't correct
33 Incorrect 10 ms 4912 KB Output isn't correct
34 Incorrect 11 ms 4700 KB Output isn't correct
35 Incorrect 15 ms 4700 KB Output isn't correct
36 Incorrect 13 ms 4700 KB Output isn't correct
37 Incorrect 14 ms 4936 KB Output isn't correct
38 Incorrect 21 ms 4940 KB Output isn't correct
39 Incorrect 15 ms 4956 KB Output isn't correct
40 Incorrect 18 ms 4960 KB Output isn't correct
41 Incorrect 31 ms 4912 KB Output isn't correct
42 Incorrect 20 ms 5212 KB Output isn't correct
43 Incorrect 26 ms 5044 KB Output isn't correct
44 Incorrect 33 ms 5212 KB Output isn't correct
45 Incorrect 24 ms 5168 KB Output isn't correct
46 Incorrect 28 ms 5208 KB Output isn't correct
47 Incorrect 39 ms 5212 KB Output isn't correct
48 Incorrect 29 ms 5208 KB Output isn't correct
49 Incorrect 35 ms 5432 KB Output isn't correct
50 Incorrect 46 ms 5212 KB Output isn't correct
51 Incorrect 33 ms 5464 KB Output isn't correct
52 Incorrect 39 ms 5468 KB Output isn't correct
53 Incorrect 54 ms 5468 KB Output isn't correct
54 Incorrect 39 ms 5724 KB Output isn't correct
55 Incorrect 45 ms 5688 KB Output isn't correct
56 Incorrect 62 ms 5720 KB Output isn't correct
57 Incorrect 46 ms 5980 KB Output isn't correct
58 Incorrect 52 ms 5868 KB Output isn't correct
59 Incorrect 72 ms 5980 KB Output isn't correct
60 Incorrect 50 ms 6232 KB Output isn't correct
61 Incorrect 58 ms 6236 KB Output isn't correct
62 Incorrect 92 ms 6236 KB Output isn't correct
63 Incorrect 78 ms 6228 KB Output isn't correct
64 Incorrect 129 ms 6072 KB Output isn't correct
65 Incorrect 108 ms 6236 KB Output isn't correct
66 Incorrect 84 ms 6236 KB Output isn't correct
67 Correct 82 ms 6232 KB Output is correct
68 Incorrect 41 ms 6224 KB Output isn't correct
69 Incorrect 36 ms 6236 KB Output isn't correct
70 Incorrect 35 ms 6236 KB Output isn't correct
71 Incorrect 33 ms 6228 KB Output isn't correct
72 Incorrect 27 ms 6228 KB Output isn't correct
73 Incorrect 37 ms 6492 KB Output isn't correct
74 Incorrect 53 ms 6488 KB Output isn't correct
75 Incorrect 60 ms 6508 KB Output isn't correct
76 Incorrect 49 ms 6492 KB Output isn't correct
77 Incorrect 47 ms 6488 KB Output isn't correct
78 Correct 58 ms 6492 KB Output is correct
79 Incorrect 45 ms 6488 KB Output isn't correct
80 Incorrect 45 ms 6236 KB Output isn't correct
81 Incorrect 56 ms 6492 KB Output isn't correct
82 Incorrect 50 ms 6488 KB Output isn't correct
83 Incorrect 63 ms 6448 KB Output isn't correct
84 Incorrect 57 ms 6232 KB Output isn't correct
85 Incorrect 59 ms 6236 KB Output isn't correct
86 Incorrect 61 ms 6236 KB Output isn't correct
87 Incorrect 59 ms 6232 KB Output isn't correct
88 Incorrect 64 ms 6232 KB Output isn't correct
89 Incorrect 64 ms 6236 KB Output isn't correct
90 Incorrect 69 ms 6232 KB Output isn't correct
91 Incorrect 70 ms 6232 KB Output isn't correct
92 Incorrect 60 ms 6232 KB Output isn't correct