oj.uz

Submission #867785

# Submission time Handle Problem Language Result Execution time Memory
867785 2023-10-29T13:01:15 Z BoopyTheNoob Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 424 ms 111968 KB 
/*
BoopyTheNoob, 29.10.2023, 20:55 +8

Somehow there's an error if the variables aren't declared globally.
*/

#include <bits/stdc++.h>
using namespace std;

int main (void) {
    int dx[4]{1, -1, 0, 0}, dy[4]{0, 0, 1, -1};
    int N, M;
    iostream::sync_with_stdio(false);
	cin.tie(0);
    cin >> N >> M;
    //vector<string> grid(N);
    string grid[N];
    for (int i = 0; i < N; i++)
        cin >> grid[i];
    //vector<vector<int>> dist(N, vector<int>(M, 0));
    deque<pair<int, int>> bfs;
    bfs.push_back({0, 0});
    int dist[N][M], ans = 1;
    for (int i = 0; i < N; i++)
        for (int j = 0; j < M; j++)
            dist[i][j] = 0;
    dist[0][0] = 1;
    while (!bfs.empty()) {
        int x = bfs.front().first, y = bfs.front().second;
        bfs.pop_front();
        ans = max(ans, dist[x][y]);
        for (int i = 0; i < 4; i++) {
            int nx = x + dx[i], ny = y + dy[i];
            /*if (nx < 0 || nx >= N || ny < 0 || ny >= M)
                continue;
            if (dist[nx][ny] != 0 || grid[nx][ny] == '.')
                continue;
            pair<int, int> next = {nx, ny};
            if (grid[x][y] != grid[nx][ny]) {
                dist[nx][ny] = dist[x][y] + 1;
                bfs.push_back({nx, ny});
            } else {
                dist[nx][ny] = dist[x][y];
                bfs.push_front({nx, ny});
            }*/
            if (nx >= 0 && nx < N && ny >= 0 && ny < M && grid[nx][ny] != '.' && dist[nx][ny] == 0) {
                if (grid[nx][ny] != grid[x][y]) {
                    dist[nx][ny] = dist[x][y] + 1;
                    bfs.push_back({nx, ny});
                } else {
                    dist[nx][ny] = dist[x][y];
                    bfs.push_front({nx, ny});
                }
            }
        }
    }
    /*for (auto x: dist) {
        for (auto y: x) {
            cout << y << " ";
        }
        cout << endl;
    }*/
    cout << ans;
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1628 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 4 ms 1368 KB Output is correct
5 Correct 2 ms 860 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 788 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 3 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 6 ms 1628 KB Output is correct
16 Correct 7 ms 1628 KB Output is correct
17 Correct 5 ms 1628 KB Output is correct
18 Correct 4 ms 1368 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 24 ms 8028 KB Output is correct
3 Correct 165 ms 80724 KB Output is correct
4 Correct 39 ms 19032 KB Output is correct
5 Correct 122 ms 45472 KB Output is correct
6 Correct 384 ms 94696 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 848 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 28 ms 8260 KB Output is correct
14 Correct 14 ms 4956 KB Output is correct
15 Correct 10 ms 5220 KB Output is correct
16 Correct 17 ms 3676 KB Output is correct
17 Correct 64 ms 20572 KB Output is correct
18 Correct 62 ms 20316 KB Output is correct
19 Correct 57 ms 19108 KB Output is correct
20 Correct 36 ms 17496 KB Output is correct
21 Correct 90 ms 47024 KB Output is correct
22 Correct 111 ms 45400 KB Output is correct
23 Correct 130 ms 39384 KB Output is correct
24 Correct 91 ms 45876 KB Output is correct
25 Correct 328 ms 80844 KB Output is correct
26 Correct 243 ms 111968 KB Output is correct
27 Correct 304 ms 107440 KB Output is correct
28 Correct 424 ms 94476 KB Output is correct
29 Correct 385 ms 92804 KB Output is correct
30 Correct 342 ms 97312 KB Output is correct
31 Correct 304 ms 52140 KB Output is correct
32 Correct 248 ms 96012 KB Output is correct