#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 4000 + 10;
int h[maxn][maxn];
string s[maxn];
int adjx[] = {0, -1, 0, 1};
int adjy[] = {1, 0, -1, 0};
int main(){
ios_base::sync_with_stdio(false);
int n, m;
cin >> n >> m;
for (int i = 0; i < n; i++)
cin >> s[i];
deque<pair<int,int>> deQ;
memset(h, -1, sizeof h);
h[0][0] = 1;
deQ.push_back({0,0});
int answer = 0;
while (!deQ.empty()){
auto it = deQ.front();
deQ.pop_front();
int x = it.first, y = it.second;
answer = max(answer, h[x][y]);
for (int z = 0; z < 4; z++){
int nx = x + adjx[z], ny = y + adjy[z];
if (0 <= nx and nx < n and 0 <= ny and ny < m and s[nx][ny] != '.'){
int w = (s[nx][ny] != s[x][y]);
if (h[nx][ny] != -1 and h[nx][ny] <= h[x][y] + 1)
continue;
h[nx][ny] = h[x][y] + w;
if (w == 0)
deQ.push_front({nx,ny});
else
deQ.push_back({nx,ny});
}
}
}
cout << answer << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
44 ms |
63864 KB |
Output is correct |
| 2 |
Correct |
39 ms |
63352 KB |
Output is correct |
| 3 |
Correct |
39 ms |
63480 KB |
Output is correct |
| 4 |
Correct |
38 ms |
63864 KB |
Output is correct |
| 5 |
Correct |
35 ms |
63608 KB |
Output is correct |
| 6 |
Correct |
37 ms |
63352 KB |
Output is correct |
| 7 |
Correct |
34 ms |
63352 KB |
Output is correct |
| 8 |
Correct |
39 ms |
63352 KB |
Output is correct |
| 9 |
Correct |
34 ms |
63356 KB |
Output is correct |
| 10 |
Correct |
34 ms |
63480 KB |
Output is correct |
| 11 |
Correct |
35 ms |
63480 KB |
Output is correct |
| 12 |
Correct |
37 ms |
63608 KB |
Output is correct |
| 13 |
Correct |
36 ms |
63608 KB |
Output is correct |
| 14 |
Correct |
35 ms |
63608 KB |
Output is correct |
| 15 |
Correct |
41 ms |
63864 KB |
Output is correct |
| 16 |
Correct |
44 ms |
63896 KB |
Output is correct |
| 17 |
Correct |
40 ms |
63864 KB |
Output is correct |
| 18 |
Correct |
39 ms |
63904 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
34 ms |
63480 KB |
Output is correct |
| 2 |
Correct |
81 ms |
66600 KB |
Output is correct |
| 3 |
Correct |
187 ms |
83320 KB |
Output is correct |
| 4 |
Correct |
83 ms |
69496 KB |
Output is correct |
| 5 |
Correct |
161 ms |
75384 KB |
Output is correct |
| 6 |
Correct |
609 ms |
96664 KB |
Output is correct |
| 7 |
Correct |
39 ms |
63480 KB |
Output is correct |
| 8 |
Correct |
40 ms |
63488 KB |
Output is correct |
| 9 |
Correct |
39 ms |
63608 KB |
Output is correct |
| 10 |
Correct |
36 ms |
63540 KB |
Output is correct |
| 11 |
Correct |
37 ms |
63480 KB |
Output is correct |
| 12 |
Correct |
40 ms |
63480 KB |
Output is correct |
| 13 |
Correct |
69 ms |
66552 KB |
Output is correct |
| 14 |
Correct |
53 ms |
65144 KB |
Output is correct |
| 15 |
Correct |
47 ms |
65400 KB |
Output is correct |
| 16 |
Correct |
49 ms |
64760 KB |
Output is correct |
| 17 |
Correct |
117 ms |
69880 KB |
Output is correct |
| 18 |
Correct |
96 ms |
69848 KB |
Output is correct |
| 19 |
Correct |
80 ms |
69496 KB |
Output is correct |
| 20 |
Correct |
70 ms |
69248 KB |
Output is correct |
| 21 |
Correct |
124 ms |
75512 KB |
Output is correct |
| 22 |
Correct |
160 ms |
75256 KB |
Output is correct |
| 23 |
Correct |
199 ms |
73976 KB |
Output is correct |
| 24 |
Correct |
128 ms |
75256 KB |
Output is correct |
| 25 |
Correct |
382 ms |
83320 KB |
Output is correct |
| 26 |
Correct |
694 ms |
129028 KB |
Output is correct |
| 27 |
Correct |
602 ms |
113272 KB |
Output is correct |
| 28 |
Correct |
687 ms |
96860 KB |
Output is correct |
| 29 |
Correct |
609 ms |
94968 KB |
Output is correct |
| 30 |
Correct |
640 ms |
101040 KB |
Output is correct |
| 31 |
Correct |
519 ms |
77176 KB |
Output is correct |
| 32 |
Correct |
634 ms |
104440 KB |
Output is correct |
