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Submission #759125

# Submission time Handle Problem Language Result Execution time Memory
759125 2023-06-15T19:15:44 Z Blagoj Mecho (IOI09_mecho) C++14
32 / 100
 139 ms 4416 KB 
#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define ll long long
#define all(x) x.begin(), x.end()

int n, s, times[802][802];
vector<string> v(802);
pair<int, int> st, en;

const int dx[4] = {0, 0, -1, 1};
const int dy[4] = {-1, 1, 0, 0};

inline bool valid(int x, int y) {
    return (x >= 0 && x < n && y >= 0 && y < n && v[x][y] != 'T');
}

bool check(int m) {
    m++;
    if (m > times[st.first][st.second]) return 0;
    int moves = 0;
    queue<pair<int, int>> q;
    q.push(st);
    bool vis[n][n];
    memset(vis, 0, sizeof(vis));
    vis[st.first][st.second] = 1;
    do {
        int sz = q.size();
        while (sz--) {
            int x = q.front().first, y = q.front().second;
            q.pop();
            for (int d = 0; d < 4; d++) {
                int nx = x + dx[d], ny = y + dy[d];
                if (valid(nx, ny) && m <= times[nx][ny] && !vis[nx][ny]) {
                    vis[nx][ny] = 1;
                    q.push({nx, ny});
                    if (make_pair(nx, ny) == en) return 1;
                }
            }
        }
        moves++;
        if (moves >= s) {
            moves = 0;
            m++;
        }
    }
    while (q.size() > 0);
    return 0;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> s;
    queue<pair<int, int>> h;

    for (int i = 0; i < n; i++) {
        cin >> v[i];
        for (int j = 0; j < n; j++) {
            times[i][j] = n * n + 1000;
            if (v[i][j] == 'M') st = {i, j};
            if (v[i][j] == 'H') {
                h.push({i, j});
                times[i][j] = 0;
            }
            if (v[i][j] == 'D') en = {i, j};
        }
    }

    while (h.size() > 0) {
        int x = h.front().first, y = h.front().second;
        h.pop();
        for (int d = 0; d < 4; d++) {
            int nx = x + dx[d], ny = y + dy[d];
            if (valid(nx, ny) && times[x][y] + 1 < times[nx][ny]) {
                times[nx][ny] = times[x][y] + 1;
                h.push({nx, ny});
            }
        }
    }

    int l = 0, r = n * n + 2;
    while (l + 1 < r) {
        int m = (l + r) / 2;
        if (check(m)) l = m;
        else r = m;
    }

    cout << l;
}

Subtask #1
32.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Incorrect 0 ms 340 KB Output isn't correct
3 Incorrect 0 ms 340 KB Output isn't correct
4 Incorrect 0 ms 340 KB Output isn't correct
5 Correct 0 ms 340 KB Output is correct
6 Incorrect 0 ms 340 KB Output isn't correct
7 Incorrect 68 ms 4256 KB Output isn't correct
8 Incorrect 1 ms 340 KB Output isn't correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Incorrect 1 ms 468 KB Output isn't correct
13 Correct 1 ms 468 KB Output is correct
14 Incorrect 1 ms 468 KB Output isn't correct
15 Incorrect 0 ms 340 KB Output isn't correct
16 Correct 0 ms 340 KB Output is correct
17 Incorrect 0 ms 340 KB Output isn't correct
18 Correct 0 ms 340 KB Output is correct
19 Incorrect 0 ms 340 KB Output isn't correct
20 Correct 0 ms 340 KB Output is correct
21 Incorrect 0 ms 468 KB Output isn't correct
22 Correct 1 ms 468 KB Output is correct
23 Incorrect 1 ms 468 KB Output isn't correct
24 Correct 1 ms 468 KB Output is correct
25 Incorrect 1 ms 468 KB Output isn't correct
26 Correct 1 ms 468 KB Output is correct
27 Incorrect 1 ms 468 KB Output isn't correct
28 Correct 1 ms 468 KB Output is correct
29 Incorrect 1 ms 468 KB Output isn't correct
30 Correct 1 ms 468 KB Output is correct
31 Incorrect 1 ms 596 KB Output isn't correct
32 Correct 1 ms 468 KB Output is correct
33 Incorrect 2 ms 1620 KB Output isn't correct
34 Correct 2 ms 1620 KB Output is correct
35 Correct 15 ms 1620 KB Output is correct
36 Incorrect 3 ms 1876 KB Output isn't correct
37 Correct 3 ms 1876 KB Output is correct
38 Correct 20 ms 1940 KB Output is correct
39 Incorrect 3 ms 2132 KB Output isn't correct
40 Correct 3 ms 2132 KB Output is correct
41 Correct 27 ms 2132 KB Output is correct
42 Incorrect 5 ms 2388 KB Output isn't correct
43 Correct 5 ms 2388 KB Output is correct
44 Correct 35 ms 2312 KB Output is correct
45 Incorrect 5 ms 2644 KB Output isn't correct
46 Correct 4 ms 2644 KB Output is correct
47 Correct 39 ms 2644 KB Output is correct
48 Incorrect 5 ms 2900 KB Output isn't correct
49 Correct 5 ms 2880 KB Output is correct
50 Correct 49 ms 2900 KB Output is correct
51 Incorrect 6 ms 3156 KB Output isn't correct
52 Correct 6 ms 3156 KB Output is correct
53 Correct 60 ms 3240 KB Output is correct
54 Incorrect 7 ms 3540 KB Output isn't correct
55 Correct 6 ms 3460 KB Output is correct
56 Correct 69 ms 3540 KB Output is correct
57 Incorrect 7 ms 3796 KB Output isn't correct
58 Correct 9 ms 3760 KB Output is correct
59 Correct 82 ms 3796 KB Output is correct
60 Incorrect 9 ms 4052 KB Output isn't correct
61 Correct 8 ms 4052 KB Output is correct
62 Correct 91 ms 4052 KB Output is correct
63 Correct 69 ms 4140 KB Output is correct
64 Correct 139 ms 4140 KB Output is correct
65 Correct 106 ms 4052 KB Output is correct
66 Incorrect 89 ms 4052 KB Output isn't correct
67 Incorrect 82 ms 4052 KB Output isn't correct
68 Correct 31 ms 4080 KB Output is correct
69 Correct 28 ms 4076 KB Output is correct
70 Correct 28 ms 4188 KB Output is correct
71 Correct 29 ms 4172 KB Output is correct
72 Correct 21 ms 4076 KB Output is correct
73 Correct 21 ms 4332 KB Output is correct
74 Correct 44 ms 4412 KB Output is correct
75 Correct 53 ms 4328 KB Output is correct
76 Correct 50 ms 4308 KB Output is correct
77 Correct 54 ms 4416 KB Output is correct
78 Incorrect 56 ms 4304 KB Output isn't correct
79 Correct 34 ms 4308 KB Output is correct
80 Correct 44 ms 4300 KB Output is correct
81 Correct 49 ms 4280 KB Output is correct
82 Correct 43 ms 4308 KB Output is correct
83 Correct 61 ms 4352 KB Output is correct
84 Correct 56 ms 4356 KB Output is correct
85 Correct 71 ms 4308 KB Output is correct
86 Correct 65 ms 4344 KB Output is correct
87 Correct 57 ms 4308 KB Output is correct
88 Correct 60 ms 4296 KB Output is correct
89 Correct 68 ms 4296 KB Output is correct
90 Correct 71 ms 4300 KB Output is correct
91 Correct 62 ms 4296 KB Output is correct
92 Correct 70 ms 4308 KB Output is correct