oj.uz

Submission #513894

# Submission time Handle Problem Language Result Execution time Memory
513894 2022-01-17T22:48:03 Z nhuang685 Mecho (IOI09_mecho) C++17
4 / 100
 159 ms 6740 KB 
#include <bits/stdc++.h>

#ifdef VSLOCAL
#include "debug/d.h"
#endif
#ifdef LOCAL
// Don't use this for USACO
#include "../../debug/d.h"
#endif

using namespace std;

using ll = long long;
using ld = long double;
#if defined(LOCAL) || defined(VSLOCAL)
#define dbg(...) line_info(__LINE__, #__VA_ARGS__), dbg1(__VA_ARGS__)
void nline() { cerr << '\n'; }
#else
#define dbg(...) 0
void nline() {}
#endif

int main() {
    ios::sync_with_stdio(0); cin.tie(0);

    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("log.txt", "w", stderr);
    #endif

    const array<int, 4> dx {-1, 0, 1, 0}, dy {0, 1, 0, -1};

    // int N, S;
    int N; ll S;
    cin >> N >> S;
    vector<vector<char>> grid (N, vector<char> (N));
    queue<pair<ll, pair<int, int>>> q;
    vector<vector<ll>> beetime (N, vector<ll> (N, (ll)4e18));
    vector<vector<bool>> visited (N, vector<bool> (N));
    pair<int, int> honey, home;

    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < N; ++j) {
            cin >> grid[i][j];
            if (grid[i][j] == 'H') { 
                q.push({0, {i, j}}); 
                visited[i][j] = true;
                beetime[i][j] = 0;
            }
            else if (grid[i][j] == 'M') honey = {i, j};
            else if (grid[i][j] == 'D') home = {i, j};
        }
    }

    while (!q.empty()) {
        auto [dist, loc] = q.front();
        q.pop();

        for (int d = 0; d < 4; ++d) {
            pair<int, int> nloc = {loc.first + dx[d], loc.second + dy[d]};
            if (nloc.first < 0 || nloc.first >= N || nloc.second < 0 || nloc.second >= N || visited[nloc.first][nloc.second]) continue;
            if (grid[nloc.first][nloc.second] == 'G' || grid[nloc.first][nloc.second] == 'M') {
                visited[nloc.first][nloc.second] = true;
                beetime[nloc.first][nloc.second] = dist + S;
                q.push({dist + S, nloc});
            }
        }
    }
    dbg(beetime);

    auto good = [&](ll val) {
        visited.assign(N, vector<bool> (N));
        visited[honey.first][honey.second] = true;
        while (!q.empty()) q.pop();
        q.push({val * S, honey});
        while (!q.empty()) {
            auto [dist, loc] = q.front();
            q.pop();

            for (int d = 0; d < 4; ++d) {
                pair<int, int> nloc = {loc.first + dx[d], loc.second + dy[d]};
                if (nloc.first < 0 || nloc.first >= N || nloc.second < 0 || nloc.second >= N 
                    || visited[nloc.first][nloc.second] || dist + 1 >= beetime[nloc.first][nloc.second]) continue;
                if (grid[nloc.first][nloc.second] == 'D') {
                    return true;
                }
                else if (grid[nloc.first][nloc.second] == 'G') {
                    visited[nloc.first][nloc.second] = true;
                    q.push({dist + 1, nloc});
                }
            }
        }
        return false;
    };

    ll low = 0, high = 1e15;
    while (low < high) {
        ll mid = (low + high + 1) / 2;
        if (good(mid)) low = mid;
        else high = mid - 1;
    }
    
    // if (good(low)) cout << low << '\n';
    // else cout << "-1\n";
    cout << "-1\n";
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:19:18: warning: statement has no effect [-Wunused-value]
   19 | #define dbg(...) 0
      |                  ^
mecho.cpp:69:5: note: in expansion of macro 'dbg'
   69 |     dbg(beetime);
      |     ^~~

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Incorrect 0 ms 204 KB Output isn't correct
4 Incorrect 0 ms 204 KB Output isn't correct
5 Incorrect 0 ms 204 KB Output isn't correct
6 Incorrect 0 ms 204 KB Output isn't correct
7 Incorrect 80 ms 6336 KB Output isn't correct
8 Correct 0 ms 204 KB Output is correct
9 Incorrect 0 ms 204 KB Output isn't correct
10 Incorrect 1 ms 204 KB Output isn't correct
11 Incorrect 0 ms 204 KB Output isn't correct
12 Incorrect 1 ms 332 KB Output isn't correct
13 Incorrect 1 ms 332 KB Output isn't correct
14 Correct 2 ms 332 KB Output is correct
15 Incorrect 1 ms 204 KB Output isn't correct
16 Incorrect 0 ms 204 KB Output isn't correct
17 Incorrect 0 ms 204 KB Output isn't correct
18 Incorrect 0 ms 204 KB Output isn't correct
19 Incorrect 0 ms 204 KB Output isn't correct
20 Incorrect 0 ms 204 KB Output isn't correct
21 Incorrect 1 ms 204 KB Output isn't correct
22 Incorrect 1 ms 204 KB Output isn't correct
23 Incorrect 1 ms 332 KB Output isn't correct
24 Incorrect 1 ms 332 KB Output isn't correct
25 Incorrect 1 ms 332 KB Output isn't correct
26 Incorrect 1 ms 332 KB Output isn't correct
27 Incorrect 1 ms 332 KB Output isn't correct
28 Incorrect 1 ms 356 KB Output isn't correct
29 Incorrect 1 ms 332 KB Output isn't correct
30 Incorrect 1 ms 332 KB Output isn't correct
31 Incorrect 1 ms 332 KB Output isn't correct
32 Incorrect 1 ms 332 KB Output isn't correct
33 Incorrect 5 ms 1356 KB Output isn't correct
34 Incorrect 7 ms 1460 KB Output isn't correct
35 Incorrect 20 ms 1356 KB Output isn't correct
36 Incorrect 6 ms 1740 KB Output isn't correct
37 Incorrect 5 ms 1740 KB Output isn't correct
38 Incorrect 28 ms 1740 KB Output isn't correct
39 Incorrect 6 ms 2124 KB Output isn't correct
40 Incorrect 6 ms 2124 KB Output isn't correct
41 Incorrect 29 ms 2124 KB Output isn't correct
42 Incorrect 12 ms 2508 KB Output isn't correct
43 Incorrect 13 ms 2612 KB Output isn't correct
44 Incorrect 43 ms 2600 KB Output isn't correct
45 Incorrect 12 ms 3020 KB Output isn't correct
46 Incorrect 13 ms 3020 KB Output isn't correct
47 Incorrect 52 ms 3096 KB Output isn't correct
48 Incorrect 13 ms 3604 KB Output isn't correct
49 Incorrect 12 ms 3604 KB Output isn't correct
50 Incorrect 61 ms 3604 KB Output isn't correct
51 Incorrect 15 ms 4180 KB Output isn't correct
52 Incorrect 16 ms 4172 KB Output isn't correct
53 Incorrect 79 ms 4172 KB Output isn't correct
54 Incorrect 20 ms 4684 KB Output isn't correct
55 Incorrect 21 ms 4684 KB Output isn't correct
56 Incorrect 90 ms 4772 KB Output isn't correct
57 Incorrect 21 ms 5324 KB Output isn't correct
58 Incorrect 27 ms 5444 KB Output isn't correct
59 Incorrect 100 ms 5452 KB Output isn't correct
60 Incorrect 24 ms 6128 KB Output isn't correct
61 Incorrect 22 ms 6092 KB Output isn't correct
62 Incorrect 109 ms 6092 KB Output isn't correct
63 Incorrect 101 ms 6136 KB Output isn't correct
64 Incorrect 159 ms 6092 KB Output isn't correct
65 Incorrect 157 ms 6124 KB Output isn't correct
66 Incorrect 138 ms 6136 KB Output isn't correct
67 Correct 103 ms 6092 KB Output is correct
68 Incorrect 47 ms 6092 KB Output isn't correct
69 Incorrect 50 ms 6196 KB Output isn't correct
70 Incorrect 47 ms 6160 KB Output isn't correct
71 Incorrect 40 ms 6168 KB Output isn't correct
72 Incorrect 35 ms 6092 KB Output isn't correct
73 Incorrect 44 ms 6684 KB Output isn't correct
74 Incorrect 74 ms 6740 KB Output isn't correct
75 Incorrect 81 ms 6664 KB Output isn't correct
76 Incorrect 73 ms 6668 KB Output isn't correct
77 Incorrect 62 ms 6664 KB Output isn't correct
78 Correct 68 ms 6520 KB Output is correct
79 Incorrect 57 ms 6540 KB Output isn't correct
80 Incorrect 62 ms 6604 KB Output isn't correct
81 Incorrect 70 ms 6648 KB Output isn't correct
82 Incorrect 59 ms 6620 KB Output isn't correct
83 Incorrect 72 ms 6540 KB Output isn't correct
84 Incorrect 64 ms 6536 KB Output isn't correct
85 Incorrect 66 ms 6444 KB Output isn't correct
86 Incorrect 77 ms 6540 KB Output isn't correct
87 Incorrect 86 ms 6540 KB Output isn't correct
88 Incorrect 71 ms 6440 KB Output isn't correct
89 Incorrect 75 ms 6436 KB Output isn't correct
90 Incorrect 86 ms 6348 KB Output isn't correct
91 Incorrect 78 ms 6436 KB Output isn't correct
92 Incorrect 79 ms 6348 KB Output isn't correct