#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() {
iostream::sync_with_stdio(false);
cin.tie(0);
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.size()) {
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;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
3692 KB |
Output is correct |
| 2 |
Correct |
1 ms |
492 KB |
Output is correct |
| 3 |
Correct |
1 ms |
620 KB |
Output is correct |
| 4 |
Correct |
9 ms |
3564 KB |
Output is correct |
| 5 |
Correct |
3 ms |
2028 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
620 KB |
Output is correct |
| 8 |
Correct |
1 ms |
748 KB |
Output is correct |
| 9 |
Correct |
1 ms |
876 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1644 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1516 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2028 KB |
Output is correct |
| 13 |
Correct |
3 ms |
2028 KB |
Output is correct |
| 14 |
Correct |
3 ms |
2028 KB |
Output is correct |
| 15 |
Correct |
11 ms |
3436 KB |
Output is correct |
| 16 |
Correct |
14 ms |
3692 KB |
Output is correct |
| 17 |
Correct |
10 ms |
3564 KB |
Output is correct |
| 18 |
Correct |
8 ms |
3436 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
15852 KB |
Output is correct |
| 2 |
Correct |
44 ms |
11244 KB |
Output is correct |
| 3 |
Correct |
220 ms |
61932 KB |
Output is correct |
| 4 |
Correct |
75 ms |
28288 KB |
Output is correct |
| 5 |
Correct |
189 ms |
46212 KB |
Output is correct |
| 6 |
Correct |
705 ms |
96644 KB |
Output is correct |
| 7 |
Correct |
14 ms |
16524 KB |
Output is correct |
| 8 |
Correct |
14 ms |
15852 KB |
Output is correct |
| 9 |
Correct |
2 ms |
748 KB |
Output is correct |
| 10 |
Correct |
1 ms |
620 KB |
Output is correct |
| 11 |
Correct |
13 ms |
16236 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1132 KB |
Output is correct |
| 13 |
Correct |
45 ms |
11244 KB |
Output is correct |
| 14 |
Correct |
25 ms |
7276 KB |
Output is correct |
| 15 |
Correct |
22 ms |
9580 KB |
Output is correct |
| 16 |
Correct |
21 ms |
4332 KB |
Output is correct |
| 17 |
Correct |
115 ms |
24172 KB |
Output is correct |
| 18 |
Correct |
93 ms |
30956 KB |
Output is correct |
| 19 |
Correct |
74 ms |
28272 KB |
Output is correct |
| 20 |
Correct |
57 ms |
21356 KB |
Output is correct |
| 21 |
Correct |
138 ms |
45420 KB |
Output is correct |
| 22 |
Correct |
188 ms |
46316 KB |
Output is correct |
| 23 |
Correct |
227 ms |
38252 KB |
Output is correct |
| 24 |
Correct |
141 ms |
42372 KB |
Output is correct |
| 25 |
Correct |
460 ms |
82960 KB |
Output is correct |
| 26 |
Correct |
439 ms |
121456 KB |
Output is correct |
| 27 |
Correct |
583 ms |
109340 KB |
Output is correct |
| 28 |
Correct |
699 ms |
96276 KB |
Output is correct |
| 29 |
Correct |
700 ms |
94560 KB |
Output is correct |
| 30 |
Correct |
640 ms |
98720 KB |
Output is correct |
| 31 |
Correct |
566 ms |
65260 KB |
Output is correct |
| 32 |
Correct |
502 ms |
94504 KB |
Output is correct |
