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Submission #1049527

# Submission time Handle Problem Language Result Execution time Memory
1049527 2024-08-08T20:41:35 Z inkvizytor Tracks in the Snow (BOI13_tracks) C++17
86.875 / 100
 1587 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int h, w;
    cin >> h >> w;
    vector<string> s (h);
    for (int i = 0; i < h; i++) {
        cin >> s[i];
    }
    vector<vector<pair<int, bool>>> g (h*w);
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            if (s[i][j] == '.') continue;
            if (i != 0 && s[i-1][j] != '.') {
                g[i*w+j].push_back({(i-1)*w+j, s[i][j]==s[i-1][j]});
            }
            if (j != 0 && s[i][j-1] != '.') {
                g[i*w+j].push_back({i*w+j-1, s[i][j]==s[i][j-1]});
            }
            if (i != h-1 && s[i+1][j] != '.') {
                g[i*w+j].push_back({(i+1)*w+j, s[i][j]==s[i+1][j]});
            }
            if (j != w-1 && s[i][j+1] != '.') {
                g[i*w+j].push_back({i*w+j+1, s[i][j]==s[i][j+1]});
            }
        }
    }
    deque<pair<int, int>> q;
    vector<bool> odw (h*w, 0);
    q.push_back({0, 1});
    int maxd = 0;
    while (!q.empty()) {
        auto x = q.front();
        q.pop_front();
        if (odw[x.first]) {
            continue;
        }
        maxd = max(maxd, x.second);
        odw[x.first] = 1;
        for (auto i : g[x.first]) {
            if (odw[i.first]) continue;
            if (i.second) {
                q.push_front({i.first, x.second});
            }
            else {
                q.push_back({i.first, x.second+1});
            }
        }
    }
    cout << maxd << '\n';
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 17752 KB Output is correct
2 Correct 1 ms 408 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 16 ms 11816 KB Output is correct
5 Correct 3 ms 3164 KB Output is correct
6 Correct 0 ms 456 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 3 ms 3164 KB Output is correct
11 Correct 4 ms 3336 KB Output is correct
12 Correct 10 ms 6608 KB Output is correct
13 Correct 4 ms 3160 KB Output is correct
14 Correct 3 ms 3164 KB Output is correct
15 Correct 20 ms 15180 KB Output is correct
16 Correct 27 ms 17560 KB Output is correct
17 Correct 16 ms 10820 KB Output is correct
18 Correct 17 ms 11868 KB Output is correct

Subtask #2
56.875 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2136 KB Output is correct
2 Correct 98 ms 68440 KB Output is correct
3 Correct 444 ms 557468 KB Output is correct
4 Correct 124 ms 115340 KB Output is correct
5 Correct 357 ms 368200 KB Output is correct
6 Runtime error 962 ms 1048576 KB Execution killed with signal 9
7 Correct 2 ms 1880 KB Output is correct
8 Correct 2 ms 2140 KB Output is correct
9 Correct 3 ms 3148 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1884 KB Output is correct
12 Correct 2 ms 1372 KB Output is correct
13 Correct 88 ms 68372 KB Output is correct
14 Correct 48 ms 40020 KB Output is correct
15 Correct 33 ms 34752 KB Output is correct
16 Correct 41 ms 32508 KB Output is correct
17 Correct 217 ms 173920 KB Output is correct
18 Correct 129 ms 135668 KB Output is correct
19 Correct 114 ms 115496 KB Output is correct
20 Correct 95 ms 123464 KB Output is correct
21 Correct 249 ms 326488 KB Output is correct
22 Correct 355 ms 368212 KB Output is correct
23 Correct 431 ms 336980 KB Output is correct
24 Correct 261 ms 323572 KB Output is correct
25 Correct 536 ms 546928 KB Output is correct
26 Correct 1168 ms 990176 KB Output is correct
27 Runtime error 939 ms 1048576 KB Execution killed with signal 9
28 Runtime error 979 ms 1048576 KB Execution killed with signal 9
29 Runtime error 986 ms 1048576 KB Execution killed with signal 9
30 Runtime error 1012 ms 1048576 KB Execution killed with signal 9
31 Correct 1587 ms 738980 KB Output is correct
32 Runtime error 996 ms 1048576 KB Execution killed with signal 9