#include <bits/stdc++.h>
using namespace std;
char g[4005][4005];
bitset<4005> vis[4005];
vector<pair<short, short>> layer[1000005];
int h, w, dep = 1;
const int dr[4] = {0, 1, 0, -1}, dc[4] = {1, 0, -1, 0};
void dfs (int r, int c, char ch) {
if (!vis[r][c]) layer[dep].push_back({r, c});
vis[r][c] = true;
for (int k = 0; k < 4; k++) {
int rv = r + dr[k], cv = c + dc[k];
if (rv >= 1 && rv <= h && cv >= 1 && cv <= w && !vis[rv][cv] && g[rv][cv] == ch) dfs(rv, cv, ch);
}
}
int main () {
cin >> h >> w;
for (int i = 1; i <= h; i++) for (int j = 1; j <= w; j++) cin >> g[i][j];
dfs(1, 1, g[1][1]);
while (true) {
dep++;
for (auto& [r, c] : layer[dep-1]) dfs(r, c, "RF"[(dep & 1) ^ (g[1][1] == 'R')]);
layer[dep-1].clear();
if (layer[dep].empty()) {
cout << dep-1 << '\n';
return 0;
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
30300 KB |
Output is correct |
| 2 |
Correct |
4 ms |
27228 KB |
Output is correct |
| 3 |
Correct |
5 ms |
27312 KB |
Output is correct |
| 4 |
Correct |
15 ms |
31580 KB |
Output is correct |
| 5 |
Correct |
6 ms |
27228 KB |
Output is correct |
| 6 |
Correct |
3 ms |
27260 KB |
Output is correct |
| 7 |
Correct |
4 ms |
27228 KB |
Output is correct |
| 8 |
Correct |
4 ms |
27228 KB |
Output is correct |
| 9 |
Correct |
4 ms |
27228 KB |
Output is correct |
| 10 |
Correct |
7 ms |
27484 KB |
Output is correct |
| 11 |
Correct |
7 ms |
28324 KB |
Output is correct |
| 12 |
Correct |
11 ms |
27740 KB |
Output is correct |
| 13 |
Correct |
8 ms |
27224 KB |
Output is correct |
| 14 |
Correct |
7 ms |
27300 KB |
Output is correct |
| 15 |
Correct |
18 ms |
30108 KB |
Output is correct |
| 16 |
Correct |
20 ms |
30400 KB |
Output is correct |
| 17 |
Correct |
16 ms |
29788 KB |
Output is correct |
| 18 |
Correct |
15 ms |
31580 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
41308 KB |
Output is correct |
| 2 |
Correct |
72 ms |
34968 KB |
Output is correct |
| 3 |
Correct |
601 ms |
73556 KB |
Output is correct |
| 4 |
Correct |
131 ms |
36764 KB |
Output is correct |
| 5 |
Runtime error |
327 ms |
144528 KB |
Execution killed with signal 11 |
| 6 |
Correct |
992 ms |
217868 KB |
Output is correct |
| 7 |
Correct |
8 ms |
42072 KB |
Output is correct |
| 8 |
Correct |
8 ms |
41308 KB |
Output is correct |
| 9 |
Correct |
7 ms |
27736 KB |
Output is correct |
| 10 |
Correct |
5 ms |
27740 KB |
Output is correct |
| 11 |
Correct |
7 ms |
41564 KB |
Output is correct |
| 12 |
Correct |
5 ms |
27484 KB |
Output is correct |
| 13 |
Correct |
71 ms |
34964 KB |
Output is correct |
| 14 |
Correct |
40 ms |
33360 KB |
Output is correct |
| 15 |
Correct |
46 ms |
36180 KB |
Output is correct |
| 16 |
Correct |
36 ms |
31376 KB |
Output is correct |
| 17 |
Correct |
169 ms |
43920 KB |
Output is correct |
| 18 |
Correct |
150 ms |
53640 KB |
Output is correct |
| 19 |
Correct |
121 ms |
36752 KB |
Output is correct |
| 20 |
Correct |
131 ms |
40528 KB |
Output is correct |
| 21 |
Correct |
350 ms |
58260 KB |
Output is correct |
| 22 |
Runtime error |
325 ms |
144520 KB |
Execution killed with signal 11 |
| 23 |
Correct |
339 ms |
54356 KB |
Output is correct |
| 24 |
Runtime error |
357 ms |
146768 KB |
Execution killed with signal 11 |
| 25 |
Runtime error |
567 ms |
151636 KB |
Execution killed with signal 11 |
| 26 |
Runtime error |
788 ms |
1048576 KB |
Execution killed with signal 9 |
| 27 |
Correct |
1283 ms |
840128 KB |
Output is correct |
| 28 |
Correct |
972 ms |
219200 KB |
Output is correct |
| 29 |
Correct |
950 ms |
189684 KB |
Output is correct |
| 30 |
Correct |
1109 ms |
360780 KB |
Output is correct |
| 31 |
Correct |
664 ms |
80932 KB |
Output is correct |
| 32 |
Correct |
1174 ms |
611744 KB |
Output is correct |
