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Submission #827846

# Submission time Handle Problem Language Result Execution time Memory
827846 2023-08-16T20:08:41 Z Tobotis Tracks in the Snow (BOI13_tracks) C++17
100 / 100
 654 ms 130612 KB 
#include <bits/stdc++.h>

using namespace std;

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

int dist[4000][4000];

int w, h;

bool inside(int i, int j)
{
    return (0 <= i && i < w && 0 <= j && j < h);
}

int main()
{
    cin >> w >> h;
    vector<string> mp(4000);
    for (int i = 0; i < w; i++)
    {
        cin >> mp[i];
    }

    int ans = 1;

    deque<pair<int, int>> q;
    dist[0][0] = 1;
    q.push_back({0, 0});
    while (!q.empty())
    {
        auto [x, y] = q.front();
        q.pop_front();

        for (int i = 0; i < 4; i++)
        {
            int newx = x + dx[i];
            int newy = y + dy[i];
            if (inside(newx, newy) && dist[newx][newy] == 0 && mp[newx][newy] != '.')
            {
                if (mp[newx][newy] == mp[x][y])
                {
                    dist[newx][newy] = dist[x][y];
                    q.push_front({newx, newy});
                }
                else
                {
                    dist[newx][newy] = dist[x][y] + 1;
                    ans = max(ans, dist[newx][newy]);
                    q.push_back({newx, newy});
                }
            }
        }
    }
    cout << ans << endl;
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 4052 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 6 ms 3500 KB Output is correct
5 Correct 3 ms 1984 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 696 KB Output is correct
9 Correct 1 ms 828 KB Output is correct
10 Correct 5 ms 1728 KB Output is correct
11 Correct 4 ms 1492 KB Output is correct
12 Correct 5 ms 2128 KB Output is correct
13 Correct 5 ms 2004 KB Output is correct
14 Correct 5 ms 1988 KB Output is correct
15 Correct 13 ms 3828 KB Output is correct
16 Correct 12 ms 3976 KB Output is correct
17 Correct 10 ms 3908 KB Output is correct
18 Correct 6 ms 3508 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15780 KB Output is correct
2 Correct 50 ms 12564 KB Output is correct
3 Correct 358 ms 87784 KB Output is correct
4 Correct 95 ms 32428 KB Output is correct
5 Correct 210 ms 53260 KB Output is correct
6 Correct 606 ms 121964 KB Output is correct
7 Correct 16 ms 16520 KB Output is correct
8 Correct 10 ms 15820 KB Output is correct
9 Correct 4 ms 828 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 10 ms 16212 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 51 ms 12620 KB Output is correct
14 Correct 28 ms 8684 KB Output is correct
15 Correct 29 ms 11172 KB Output is correct
16 Correct 22 ms 4916 KB Output is correct
17 Correct 134 ms 28548 KB Output is correct
18 Correct 116 ms 35416 KB Output is correct
19 Correct 96 ms 32416 KB Output is correct
20 Correct 82 ms 25436 KB Output is correct
21 Correct 227 ms 52204 KB Output is correct
22 Correct 220 ms 53212 KB Output is correct
23 Correct 254 ms 43404 KB Output is correct
24 Correct 202 ms 49400 KB Output is correct
25 Correct 465 ms 108720 KB Output is correct
26 Correct 526 ms 130612 KB Output is correct
27 Correct 563 ms 127044 KB Output is correct
28 Correct 654 ms 121940 KB Output is correct
29 Correct 578 ms 119728 KB Output is correct
30 Correct 630 ms 123980 KB Output is correct
31 Correct 445 ms 73008 KB Output is correct
32 Correct 531 ms 124960 KB Output is correct