#include <bits/stdc++.h>
using namespace std;
const int N = 4000;
string grid[N];
bool vu[N][N];
int h,w;
vector<pair<int,int>> dir = {{1,0},{0,1},{-1,0},{0,-1}};
struct node{
int x,y,val;
};
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin >> h >> w;
for (int i=0; i<h; ++i){
cin >> grid[i];
}
deque<node> q;
q.emplace_back(node{0,0,1});
int ans = 0;
while (!q.empty()){
auto f = q.front();
q.pop_front();
ans = max(ans,f.val);
for (auto i:dir){
int nx = i.first+f.x, ny = i.second+f.y;
if (nx >= 0 and ny >= 0 and nx < h and ny < w and !vu[nx][ny] and grid[nx][ny] != '.'){
vu[nx][ny] = true;
if (grid[f.x][f.y] != grid[nx][ny]) q.emplace_back(node{nx,ny,f.val+1});
else q.emplace_front(node{nx,ny,f.val});
}
}
}
cout << ans;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
2724 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
596 KB |
Output is correct |
| 4 |
Correct |
5 ms |
2772 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 6 |
Correct |
1 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
596 KB |
Output is correct |
| 8 |
Correct |
1 ms |
596 KB |
Output is correct |
| 9 |
Correct |
1 ms |
852 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1364 KB |
Output is correct |
| 12 |
Correct |
5 ms |
1720 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1620 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 15 |
Correct |
8 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
12 ms |
2644 KB |
Output is correct |
| 17 |
Correct |
7 ms |
2516 KB |
Output is correct |
| 18 |
Correct |
5 ms |
2772 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
15336 KB |
Output is correct |
| 2 |
Correct |
29 ms |
6996 KB |
Output is correct |
| 3 |
Correct |
144 ms |
33756 KB |
Output is correct |
| 4 |
Correct |
38 ms |
11756 KB |
Output is correct |
| 5 |
Correct |
125 ms |
21864 KB |
Output is correct |
| 6 |
Correct |
443 ms |
54592 KB |
Output is correct |
| 7 |
Correct |
10 ms |
16084 KB |
Output is correct |
| 8 |
Correct |
11 ms |
15316 KB |
Output is correct |
| 9 |
Correct |
2 ms |
596 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
13 ms |
15772 KB |
Output is correct |
| 12 |
Correct |
1 ms |
980 KB |
Output is correct |
| 13 |
Correct |
30 ms |
7016 KB |
Output is correct |
| 14 |
Correct |
18 ms |
4992 KB |
Output is correct |
| 15 |
Correct |
13 ms |
5332 KB |
Output is correct |
| 16 |
Correct |
15 ms |
2736 KB |
Output is correct |
| 17 |
Correct |
74 ms |
12632 KB |
Output is correct |
| 18 |
Correct |
49 ms |
12504 KB |
Output is correct |
| 19 |
Correct |
45 ms |
11676 KB |
Output is correct |
| 20 |
Correct |
39 ms |
10928 KB |
Output is correct |
| 21 |
Correct |
92 ms |
22620 KB |
Output is correct |
| 22 |
Correct |
118 ms |
21836 KB |
Output is correct |
| 23 |
Correct |
150 ms |
18660 KB |
Output is correct |
| 24 |
Correct |
102 ms |
22396 KB |
Output is correct |
| 25 |
Correct |
229 ms |
33760 KB |
Output is correct |
| 26 |
Correct |
300 ms |
101632 KB |
Output is correct |
| 27 |
Correct |
371 ms |
84948 KB |
Output is correct |
| 28 |
Correct |
468 ms |
54708 KB |
Output is correct |
| 29 |
Correct |
423 ms |
50840 KB |
Output is correct |
| 30 |
Correct |
403 ms |
61584 KB |
Output is correct |
| 31 |
Correct |
359 ms |
24676 KB |
Output is correct |
| 32 |
Correct |
332 ms |
69740 KB |
Output is correct |
