oj.uz

Submission #474828

# Submission time Handle Problem Language Result Execution time Memory
474828 2021-09-20T01:59:57 Z dqk Tracks in the Snow (BOI13_tracks) C++17
93.4375 / 100
 2000 ms 1048580 KB 
#include <bits/stdc++.h>

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int n, m;
    std::cin >> n >> m;
    std::vector<std::string> g(n);
    for (int i = 0; i < n; ++i) {
        std::cin >> g[i];
    }
    std::vector<std::vector<int>> comp(n, std::vector<int>(m, -1));
    std::vector<std::set<int>> adj;
    int num = 0;
    std::function<void(int, int, char)> dfs=[&](int x, int y, char c) {
        if (x < 0 || x >= n || y < 0 || y >= m || g[x][y] == '.')
            return;
        if (comp[x][y] != -1 && comp[x][y] != num) {
            adj[comp[x][y]].insert(num);
            adj[num].insert(comp[x][y]);
        }
        if (comp[x][y] != -1 || g[x][y] != c)
            return;

        comp[x][y] = num;
        dfs(x + 1, y, c);
        dfs(x - 1, y, c);
        dfs(x, y + 1, c);
        dfs(x, y - 1, c);
    };
    for (int x = 0; x < n; ++x) {
        for (int y = 0; y < m; ++y) {
            if (comp[x][y] != -1 || g[x][y] == '.')
                continue;
            adj.push_back({});
            dfs(x, y, g[x][y]);
            num++;
        }
    }

    std::vector<int> d(num, 0);
    std::queue<int> q;
    q.push(0);
    d[0] = 1;
    int ans = 1;
    while (!q.empty()) {
        int u = q.front();
        q.pop();
        for (int v : adj[u]) {
            if (d[v] == 0) {
                q.push(v);
                d[v] = d[u] + 1;
                ans = std::max(ans, d[v]);
            }
        }
    }
    std::cout << ans << "\n";
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 9844 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 15 ms 3532 KB Output is correct
5 Correct 6 ms 2056 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 7 ms 1984 KB Output is correct
11 Correct 4 ms 1356 KB Output is correct
12 Correct 16 ms 3396 KB Output is correct
13 Correct 6 ms 2056 KB Output is correct
14 Correct 7 ms 2060 KB Output is correct
15 Correct 40 ms 9160 KB Output is correct
16 Correct 50 ms 9844 KB Output is correct
17 Correct 33 ms 8928 KB Output is correct
18 Correct 15 ms 3532 KB Output is correct

Subtask #2
63.4375 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2252 KB Output is correct
2 Correct 157 ms 40524 KB Output is correct
3 Correct 809 ms 304788 KB Output is correct
4 Correct 209 ms 58964 KB Output is correct
5 Correct 1507 ms 834520 KB Output is correct
6 Execution timed out 2037 ms 276280 KB Time limit exceeded
7 Correct 4 ms 2252 KB Output is correct
8 Correct 4 ms 2252 KB Output is correct
9 Correct 6 ms 2568 KB Output is correct
10 Correct 2 ms 1612 KB Output is correct
11 Correct 3 ms 1868 KB Output is correct
12 Correct 4 ms 2052 KB Output is correct
13 Correct 155 ms 40484 KB Output is correct
14 Correct 91 ms 23860 KB Output is correct
15 Correct 86 ms 30252 KB Output is correct
16 Correct 79 ms 19060 KB Output is correct
17 Correct 372 ms 104248 KB Output is correct
18 Correct 340 ms 119524 KB Output is correct
19 Correct 193 ms 58812 KB Output is correct
20 Correct 185 ms 70064 KB Output is correct
21 Correct 476 ms 181076 KB Output is correct
22 Correct 1479 ms 834704 KB Output is correct
23 Correct 757 ms 200480 KB Output is correct
24 Correct 609 ms 263740 KB Output is correct
25 Correct 1510 ms 476220 KB Output is correct
26 Runtime error 652 ms 1048580 KB Execution killed with signal 9
27 Correct 1741 ms 687396 KB Output is correct
28 Correct 1987 ms 276324 KB Output is correct
29 Correct 1812 ms 208800 KB Output is correct
30 Correct 1849 ms 334728 KB Output is correct
31 Execution timed out 2068 ms 338764 KB Time limit exceeded
32 Correct 1874 ms 762572 KB Output is correct