Submission #851915

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
851915	2023-09-20T19:29:08 Z	Hugo1729	Tracks in the Snow (BOI13_tracks)	C++11	100 / 100	625 ms	135556 KB

tracks

#include <bits/stdc++.h>

using namespace std;

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

int n, m, depth[4000][4000], ans = 1;
string snow[4000];

bool inside(int x, int y) {
	return (x > -1 && x < n && y > -1 && y < m && snow[x][y] != '.');
}

int main() {

	cin >> n >> m;
	for (int i = 0; i < n; i++) cin >> snow[i];

	deque<pair<int, int>> q;
	q.push_back({0, 0});
	depth[0][0] = 1;




    while (!q.empty()) {
        pair<int, int> c = q.front();
		q.pop_front();
		ans = max(ans, depth[c.first][c.second]);

        for (int i = 0; i < 4; i++) {
			int x = c.first + dx[i], y = c.second + dy[i];
            if (inside(x,y) && depth[x][y] == 0) {
                if (snow[x][y] == snow[c.first][c.second]) {
                    depth[x][y] = depth[c.first][c.second];
                    q.push_front({x,y});}
                else {
                    depth[x][y] = depth[c.first][c.second] + 1;
                    q.push_back({x,y});
                }    
            }
        }      
    }

    cout << ans;

    return 0;
}

Subtask #1

30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	12 ms	4184 KB	Output is correct
2	Correct	0 ms	600 KB	Output is correct
3	Correct	1 ms	600 KB	Output is correct
4	Correct	7 ms	3676 KB	Output is correct
5	Correct	3 ms	2136 KB	Output is correct
6	Correct	0 ms	604 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	3 ms	1880 KB	Output is correct
11	Correct	3 ms	1624 KB	Output is correct
12	Correct	5 ms	2140 KB	Output is correct
13	Correct	3 ms	2292 KB	Output is correct
14	Correct	3 ms	2136 KB	Output is correct
15	Correct	10 ms	3928 KB	Output is correct
16	Correct	14 ms	4188 KB	Output is correct
17	Correct	11 ms	3928 KB	Output is correct
18	Correct	7 ms	3672 KB	Output is correct

Subtask #2

70.0 / 70.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	15964 KB	Output is correct
2	Correct	46 ms	12624 KB	Output is correct
3	Correct	329 ms	87888 KB	Output is correct
4	Correct	92 ms	32596 KB	Output is correct
5	Correct	225 ms	53240 KB	Output is correct
6	Correct	600 ms	122456 KB	Output is correct
7	Correct	9 ms	16548 KB	Output is correct
8	Correct	8 ms	15948 KB	Output is correct
9	Correct	2 ms	856 KB	Output is correct
10	Correct	1 ms	596 KB	Output is correct
11	Correct	8 ms	16216 KB	Output is correct
12	Correct	2 ms	1116 KB	Output is correct
13	Correct	45 ms	12688 KB	Output is correct
14	Correct	26 ms	8796 KB	Output is correct
15	Correct	24 ms	11096 KB	Output is correct
16	Correct	21 ms	4944 KB	Output is correct
17	Correct	118 ms	28500 KB	Output is correct
18	Correct	103 ms	35412 KB	Output is correct
19	Correct	92 ms	32592 KB	Output is correct
20	Correct	76 ms	25452 KB	Output is correct
21	Correct	194 ms	52304 KB	Output is correct
22	Correct	228 ms	53528 KB	Output is correct
23	Correct	226 ms	43348 KB	Output is correct
24	Correct	197 ms	49632 KB	Output is correct
25	Correct	472 ms	108880 KB	Output is correct
26	Correct	364 ms	130628 KB	Output is correct
27	Correct	488 ms	135556 KB	Output is correct
28	Correct	592 ms	122684 KB	Output is correct
29	Correct	589 ms	120848 KB	Output is correct
30	Correct	625 ms	124292 KB	Output is correct
31	Correct	454 ms	73004 KB	Output is correct
32	Correct	467 ms	120780 KB	Output is correct