oj.uz

Submission #1012609

# Submission time Handle Problem Language Result Execution time Memory
1012609 2024-07-02T11:50:55 Z toast12 Mecho (IOI09_mecho) C++14
9 / 100
 114 ms 6988 KB 
#include <bits/stdc++.h>
using namespace std;
 
const int MAXN = 800;
 
int n, s;
vector<vector<char>> grid;
vector<vector<int>> dist;
 
int honey;
 
bool reachable(int mecho, int bee) {
    return (((mecho/s) <= bee-honey) || (bee == -1)) && (mecho != -1); 
}
 
void bfs(queue<pair<int, int>> &q, vector<vector<int>> &d) {
    while (!q.empty()) {
        int x = q.front().first;
        int y = q.front().second;
        q.pop();
        if (x < 1 || y < 1 || x > n || y > n)
            continue;
        if (d[x+1][y] == -1 && grid[x+1][y] != 'X' && reachable(d[x][y]+1, dist[x+1][y])) {
            q.push({x+1, y});
            d[x+1][y] = d[x][y]+1;
        }
        if (d[x-1][y] == -1 && grid[x-1][y] != 'X' && reachable(d[x][y]+1, dist[x-1][y])) {
            q.push({x-1, y});
            d[x-1][y] = d[x][y]+1;
        }
        if (d[x][y+1] == -1 && grid[x][y+1] != 'X' && reachable(d[x][y]+1, dist[x][y+1])) {
            q.push({x, y+1});
            d[x][y+1] = d[x][y]+1;
        }
        if (d[x][y-1] == -1 && grid[x][y-1] != 'X' && reachable(d[x][y]+1, dist[x][y-1])) {
            q.push({x, y-1});
            d[x][y-1] = d[x][y]+1;
        }
    }
}
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cin >> n >> s;
    grid.resize(n+2, vector<char>(n+2, '.'));
    pair<int, int> start, end;
    queue<pair<int, int>> q;
    dist.resize(n+2, vector<int>(n+2, -1));
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            cin >> grid[i][j];
            if (grid[i][j] == 'G')
                grid[i][j] = '.';
            else if (grid[i][j] == 'T')
                grid[i][j] = 'X';
            else if (grid[i][j] == 'M')
                start = {i, j};
            else if (grid[i][j] == 'D')
                end = {i, j};
            else {
                q.push({i, j});
                dist[i][j] = 0;
            }
        }
    }
    // distance for bees
    while (!q.empty()) {
        int x = q.front().first;
        int y = q.front().second;
        q.pop();
        if (x < 1 || y < 1 || x > n || y > n)
            continue;
        if (dist[x+1][y] == -1 && grid[x+1][y] != 'X') {
            q.push({x+1, y});
            dist[x+1][y] = dist[x][y]+1;
        }
        if (dist[x-1][y] == -1 && grid[x-1][y] != 'X') {
            q.push({x-1, y});
            dist[x-1][y] = dist[x][y]+1;
        }
        if (dist[x][y+1] == -1 && grid[x][y+1] != 'X') {
            q.push({x, y+1});
            dist[x][y+1] = dist[x][y]+1;
        }
        if (dist[x][y-1] == -1 && grid[x][y-1] != 'X') {
            q.push({x, y-1});
            dist[x][y-1] = dist[x][y]+1;
        }
    }
    int lo = 0, hi = MAXN*MAXN;
    int ans = -1;
    while (lo < hi) {
        int mid = (lo+hi)/2;
        vector<vector<int>> d(n+2, vector<int>(n+2, -1));
        d[start.first][start.second] = mid;
        honey = mid;
        q.push(start);
        bfs(q, d);
        if (reachable(d[end.first][end.second], dist[end.first][end.second])) {
            lo = mid+1;
            ans = mid;
        }
        else {
            hi = mid;
        }
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
9.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 452 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 Incorrect 1 ms 348 KB Output isn't correct
6 Incorrect 0 ms 348 KB Output isn't correct
7 Correct 57 ms 6836 KB Output is correct
8 Incorrect 0 ms 348 KB Output isn't correct
9 Correct 0 ms 456 KB Output is correct
10 Incorrect 0 ms 348 KB Output isn't correct
11 Correct 0 ms 344 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Correct 0 ms 348 KB Output is correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Incorrect 1 ms 348 KB Output isn't correct
17 Incorrect 0 ms 348 KB Output isn't correct
18 Incorrect 0 ms 348 KB Output isn't correct
19 Incorrect 0 ms 348 KB Output isn't correct
20 Incorrect 0 ms 348 KB Output isn't correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Incorrect 0 ms 348 KB Output isn't correct
23 Incorrect 0 ms 348 KB Output isn't correct
24 Incorrect 0 ms 348 KB Output isn't correct
25 Incorrect 1 ms 344 KB Output isn't correct
26 Incorrect 1 ms 344 KB Output isn't correct
27 Incorrect 0 ms 348 KB Output isn't correct
28 Incorrect 0 ms 348 KB Output isn't correct
29 Incorrect 0 ms 348 KB Output isn't correct
30 Incorrect 0 ms 348 KB Output isn't correct
31 Incorrect 0 ms 348 KB Output isn't correct
32 Incorrect 0 ms 456 KB Output isn't correct
33 Incorrect 5 ms 1748 KB Output isn't correct
34 Incorrect 5 ms 1700 KB Output isn't correct
35 Incorrect 14 ms 1748 KB Output isn't correct
36 Incorrect 7 ms 1948 KB Output isn't correct
37 Incorrect 6 ms 2084 KB Output isn't correct
38 Incorrect 18 ms 2112 KB Output isn't correct
39 Incorrect 8 ms 2556 KB Output isn't correct
40 Incorrect 8 ms 2508 KB Output isn't correct
41 Incorrect 22 ms 2508 KB Output isn't correct
42 Incorrect 10 ms 3264 KB Output isn't correct
43 Incorrect 10 ms 2960 KB Output isn't correct
44 Incorrect 24 ms 3020 KB Output isn't correct
45 Incorrect 12 ms 3544 KB Output isn't correct
46 Incorrect 12 ms 3492 KB Output isn't correct
47 Incorrect 31 ms 3524 KB Output isn't correct
48 Incorrect 13 ms 4132 KB Output isn't correct
49 Incorrect 13 ms 4140 KB Output isn't correct
50 Incorrect 39 ms 4052 KB Output isn't correct
51 Incorrect 17 ms 4752 KB Output isn't correct
52 Incorrect 20 ms 4744 KB Output isn't correct
53 Incorrect 45 ms 4712 KB Output isn't correct
54 Incorrect 19 ms 5420 KB Output isn't correct
55 Incorrect 19 ms 5420 KB Output isn't correct
56 Incorrect 56 ms 5344 KB Output isn't correct
57 Incorrect 23 ms 6044 KB Output isn't correct
58 Incorrect 23 ms 6076 KB Output isn't correct
59 Incorrect 66 ms 6064 KB Output isn't correct
60 Incorrect 30 ms 6988 KB Output isn't correct
61 Incorrect 27 ms 6848 KB Output isn't correct
62 Incorrect 80 ms 6724 KB Output isn't correct
63 Correct 84 ms 6732 KB Output is correct
64 Correct 106 ms 6720 KB Output is correct
65 Incorrect 114 ms 6724 KB Output isn't correct
66 Incorrect 86 ms 6724 KB Output isn't correct
67 Correct 79 ms 6720 KB Output is correct
68 Incorrect 45 ms 6760 KB Output isn't correct
69 Correct 42 ms 6764 KB Output is correct
70 Correct 41 ms 6764 KB Output is correct
71 Correct 41 ms 6796 KB Output is correct
72 Incorrect 38 ms 6760 KB Output isn't correct
73 Incorrect 33 ms 6772 KB Output isn't correct
74 Correct 39 ms 6948 KB Output is correct
75 Incorrect 42 ms 6676 KB Output isn't correct
76 Incorrect 43 ms 6772 KB Output isn't correct
77 Incorrect 48 ms 6716 KB Output isn't correct
78 Correct 50 ms 6768 KB Output is correct
79 Correct 36 ms 6780 KB Output is correct
80 Incorrect 42 ms 6752 KB Output isn't correct
81 Incorrect 44 ms 6788 KB Output isn't correct
82 Incorrect 40 ms 6788 KB Output isn't correct
83 Incorrect 52 ms 6756 KB Output isn't correct
84 Correct 44 ms 6784 KB Output is correct
85 Incorrect 49 ms 6796 KB Output isn't correct
86 Incorrect 48 ms 6796 KB Output isn't correct
87 Incorrect 53 ms 6764 KB Output isn't correct
88 Incorrect 50 ms 6776 KB Output isn't correct
89 Correct 56 ms 6984 KB Output is correct
90 Correct 54 ms 6740 KB Output is correct
91 Correct 55 ms 6736 KB Output is correct
92 Incorrect 52 ms 6772 KB Output isn't correct