#include <bits/stdc++.h>
using namespace std;
int dx[4] = {1, -1, 0, 0};
int dy[4] = {0, 0, 1, -1};
int h, w;
vector<string> tracks;
bool inside(int x, int y) {
return (x > -1 && x < h && y > -1 && y < w && tracks[x][y] != '.');
}
int main() {
cin >> h >> w;
tracks.resize(h);
for (int i = 0; i < h; i++) {
cin >> tracks[i];
}
deque<pair<int, int>> edges;
vector<vector<int>> depth(h, vector<int>(w));
edges.push_back({0, 0});
depth[0][0] = 1;
int ans = 0;
while (!edges.empty()) {
auto c = edges.front();
edges.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) continue;
if (tracks[x][y] == tracks[c.first][c.second]) {
depth[x][y] = depth[c.first][c.second];
edges.push_front({x, y});
}
else {
depth[x][y] = depth[c.first][c.second] + 1;
edges.push_back({x, y});
}
}
}
cout << ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
2184 KB |
Output is correct |
| 2 |
Correct |
0 ms |
440 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 5 |
Correct |
3 ms |
856 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
2 ms |
860 KB |
Output is correct |
| 11 |
Correct |
2 ms |
604 KB |
Output is correct |
| 12 |
Correct |
4 ms |
840 KB |
Output is correct |
| 13 |
Correct |
3 ms |
860 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1000 KB |
Output is correct |
| 15 |
Correct |
10 ms |
2136 KB |
Output is correct |
| 16 |
Correct |
12 ms |
2140 KB |
Output is correct |
| 17 |
Correct |
8 ms |
1944 KB |
Output is correct |
| 18 |
Correct |
6 ms |
1624 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
860 KB |
Output is correct |
| 2 |
Correct |
45 ms |
10344 KB |
Output is correct |
| 3 |
Correct |
355 ms |
108916 KB |
Output is correct |
| 4 |
Correct |
87 ms |
25940 KB |
Output is correct |
| 5 |
Correct |
221 ms |
55980 KB |
Output is correct |
| 6 |
Correct |
626 ms |
122632 KB |
Output is correct |
| 7 |
Correct |
2 ms |
860 KB |
Output is correct |
| 8 |
Correct |
2 ms |
860 KB |
Output is correct |
| 9 |
Correct |
2 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
2 ms |
860 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
45 ms |
10332 KB |
Output is correct |
| 14 |
Correct |
27 ms |
6488 KB |
Output is correct |
| 15 |
Correct |
23 ms |
7256 KB |
Output is correct |
| 16 |
Correct |
21 ms |
4380 KB |
Output is correct |
| 17 |
Correct |
120 ms |
28008 KB |
Output is correct |
| 18 |
Correct |
98 ms |
27676 KB |
Output is correct |
| 19 |
Correct |
88 ms |
25936 KB |
Output is correct |
| 20 |
Correct |
98 ms |
23892 KB |
Output is correct |
| 21 |
Correct |
202 ms |
57772 KB |
Output is correct |
| 22 |
Correct |
221 ms |
55812 KB |
Output is correct |
| 23 |
Correct |
233 ms |
47756 KB |
Output is correct |
| 24 |
Correct |
201 ms |
56844 KB |
Output is correct |
| 25 |
Correct |
497 ms |
109092 KB |
Output is correct |
| 26 |
Correct |
411 ms |
123968 KB |
Output is correct |
| 27 |
Correct |
533 ms |
135452 KB |
Output is correct |
| 28 |
Correct |
645 ms |
122632 KB |
Output is correct |
| 29 |
Correct |
630 ms |
120992 KB |
Output is correct |
| 30 |
Correct |
593 ms |
124900 KB |
Output is correct |
| 31 |
Correct |
451 ms |
63056 KB |
Output is correct |
| 32 |
Correct |
525 ms |
124364 KB |
Output is correct |
