#include <bits/stdc++.h>
using namespace std;
char g[4005][4005];
bitset<4005> vis[4005];
vector<pair<short, short>> layer[10000005];
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 |
91 ms |
238524 KB |
Output is correct |
| 2 |
Correct |
74 ms |
235192 KB |
Output is correct |
| 3 |
Correct |
83 ms |
235376 KB |
Output is correct |
| 4 |
Correct |
88 ms |
239568 KB |
Output is correct |
| 5 |
Correct |
77 ms |
236624 KB |
Output is correct |
| 6 |
Correct |
78 ms |
235200 KB |
Output is correct |
| 7 |
Correct |
75 ms |
235492 KB |
Output is correct |
| 8 |
Correct |
77 ms |
235444 KB |
Output is correct |
| 9 |
Correct |
72 ms |
235604 KB |
Output is correct |
| 10 |
Correct |
77 ms |
236368 KB |
Output is correct |
| 11 |
Correct |
79 ms |
237176 KB |
Output is correct |
| 12 |
Correct |
79 ms |
236772 KB |
Output is correct |
| 13 |
Correct |
78 ms |
236628 KB |
Output is correct |
| 14 |
Correct |
80 ms |
236684 KB |
Output is correct |
| 15 |
Correct |
92 ms |
238336 KB |
Output is correct |
| 16 |
Correct |
95 ms |
238496 KB |
Output is correct |
| 17 |
Correct |
82 ms |
237900 KB |
Output is correct |
| 18 |
Correct |
90 ms |
239700 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
84 ms |
252500 KB |
Output is correct |
| 2 |
Correct |
152 ms |
244308 KB |
Output is correct |
| 3 |
Correct |
657 ms |
285008 KB |
Output is correct |
| 4 |
Correct |
205 ms |
246868 KB |
Output is correct |
| 5 |
Correct |
501 ms |
389712 KB |
Output is correct |
| 6 |
Correct |
1065 ms |
429028 KB |
Output is correct |
| 7 |
Correct |
73 ms |
253428 KB |
Output is correct |
| 8 |
Correct |
89 ms |
252496 KB |
Output is correct |
| 9 |
Correct |
67 ms |
235608 KB |
Output is correct |
| 10 |
Correct |
67 ms |
235604 KB |
Output is correct |
| 11 |
Correct |
83 ms |
252884 KB |
Output is correct |
| 12 |
Correct |
75 ms |
236296 KB |
Output is correct |
| 13 |
Correct |
139 ms |
244416 KB |
Output is correct |
| 14 |
Correct |
108 ms |
241236 KB |
Output is correct |
| 15 |
Correct |
119 ms |
244308 KB |
Output is correct |
| 16 |
Correct |
105 ms |
238928 KB |
Output is correct |
| 17 |
Correct |
234 ms |
252588 KB |
Output is correct |
| 18 |
Correct |
236 ms |
262224 KB |
Output is correct |
| 19 |
Correct |
189 ms |
246952 KB |
Output is correct |
| 20 |
Correct |
203 ms |
250132 KB |
Output is correct |
| 21 |
Correct |
399 ms |
267724 KB |
Output is correct |
| 22 |
Correct |
504 ms |
389716 KB |
Output is correct |
| 23 |
Correct |
394 ms |
262772 KB |
Output is correct |
| 24 |
Correct |
415 ms |
298068 KB |
Output is correct |
| 25 |
Correct |
666 ms |
327408 KB |
Output is correct |
| 26 |
Runtime error |
746 ms |
1048576 KB |
Execution killed with signal 9 |
| 27 |
Runtime error |
1176 ms |
1048576 KB |
Execution killed with signal 9 |
| 28 |
Correct |
1057 ms |
429024 KB |
Output is correct |
| 29 |
Correct |
1067 ms |
398928 KB |
Output is correct |
| 30 |
Correct |
1099 ms |
571672 KB |
Output is correct |
| 31 |
Correct |
732 ms |
290664 KB |
Output is correct |
| 32 |
Correct |
1233 ms |
823028 KB |
Output is correct |
