#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 |
8 ms |
3932 KB |
Output is correct |
| 2 |
Correct |
1 ms |
604 KB |
Output is correct |
| 3 |
Correct |
1 ms |
604 KB |
Output is correct |
| 4 |
Correct |
5 ms |
3512 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
1 ms |
860 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1628 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1628 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1968 KB |
Output is correct |
| 15 |
Correct |
7 ms |
3692 KB |
Output is correct |
| 16 |
Correct |
8 ms |
3928 KB |
Output is correct |
| 17 |
Correct |
7 ms |
4048 KB |
Output is correct |
| 18 |
Correct |
5 ms |
3416 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
15964 KB |
Output is correct |
| 2 |
Correct |
26 ms |
11952 KB |
Output is correct |
| 3 |
Correct |
149 ms |
75392 KB |
Output is correct |
| 4 |
Correct |
47 ms |
29412 KB |
Output is correct |
| 5 |
Correct |
112 ms |
51556 KB |
Output is correct |
| 6 |
Correct |
405 ms |
109960 KB |
Output is correct |
| 7 |
Correct |
8 ms |
16732 KB |
Output is correct |
| 8 |
Correct |
7 ms |
15960 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
7 ms |
16308 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1116 KB |
Output is correct |
| 13 |
Correct |
27 ms |
11856 KB |
Output is correct |
| 14 |
Correct |
16 ms |
7972 KB |
Output is correct |
| 15 |
Correct |
12 ms |
10696 KB |
Output is correct |
| 16 |
Correct |
13 ms |
4864 KB |
Output is correct |
| 17 |
Correct |
69 ms |
25256 KB |
Output is correct |
| 18 |
Correct |
48 ms |
32088 KB |
Output is correct |
| 19 |
Correct |
47 ms |
29384 KB |
Output is correct |
| 20 |
Correct |
38 ms |
22388 KB |
Output is correct |
| 21 |
Correct |
93 ms |
51072 KB |
Output is correct |
| 22 |
Correct |
113 ms |
51572 KB |
Output is correct |
| 23 |
Correct |
134 ms |
42228 KB |
Output is correct |
| 24 |
Correct |
95 ms |
47572 KB |
Output is correct |
| 25 |
Correct |
312 ms |
96356 KB |
Output is correct |
| 26 |
Correct |
260 ms |
130760 KB |
Output is correct |
| 27 |
Correct |
307 ms |
123064 KB |
Output is correct |
| 28 |
Correct |
413 ms |
110196 KB |
Output is correct |
| 29 |
Correct |
406 ms |
108372 KB |
Output is correct |
| 30 |
Correct |
364 ms |
112212 KB |
Output is correct |
| 31 |
Correct |
343 ms |
72480 KB |
Output is correct |
| 32 |
Correct |
264 ms |
108344 KB |
Output is correct |
