#include<bits/stdc++.h>
#define ll long long
#define mod 998244353
using namespace std;
int h,w;
vector<int> dx={1, -1, 0, 0};
vector<int> dy={0, 0, 1, -1};
int depth[4000][4000], ans = 1;
char grid[4000][4000];
bool isfree(int x, int y)
{
if(x>=0 && x<h && y>=0 && y<w && grid[x][y]!='.')
{
return true;
}
return false;
}
int main()
{
cin>>h>>w;
for(int i=0; i<h; i++)
{
for(int j=0; j<w; j++)
{
cin>>grid[i][j];
}
}
deque<pair<int,int>> q;
q.push_back({0,0});
depth[0][0]=1;
while(!q.empty())
{
pair<int,int> cur=q.front();
q.pop_front();
ans=max(ans, depth[cur.first][cur.second]);
for(int i=0; i<4; i++)
{
int x=cur.first+dx[i];
int y=cur.second+dy[i];
if(isfree(x,y) && depth[x][y]==0)
{
if(grid[x][y]==grid[cur.first][cur.second])
{
depth[x][y]=depth[cur.first][cur.second];
q.push_front({x,y});
}
else
{
depth[x][y]=depth[cur.first][cur.second]+1;
q.push_back({x,y});
}
}
}
}
cout<<ans<<endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
26 ms |
5068 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
1 ms |
588 KB |
Output is correct |
| 4 |
Correct |
17 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
8 ms |
2764 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
588 KB |
Output is correct |
| 8 |
Correct |
1 ms |
716 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 10 |
Correct |
7 ms |
2380 KB |
Output is correct |
| 11 |
Correct |
5 ms |
1996 KB |
Output is correct |
| 12 |
Correct |
10 ms |
2892 KB |
Output is correct |
| 13 |
Correct |
8 ms |
2844 KB |
Output is correct |
| 14 |
Correct |
8 ms |
2764 KB |
Output is correct |
| 15 |
Correct |
28 ms |
4980 KB |
Output is correct |
| 16 |
Correct |
28 ms |
5096 KB |
Output is correct |
| 17 |
Correct |
24 ms |
4884 KB |
Output is correct |
| 18 |
Correct |
17 ms |
4940 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
20 ms |
30584 KB |
Output is correct |
| 2 |
Correct |
136 ms |
13376 KB |
Output is correct |
| 3 |
Correct |
1113 ms |
57720 KB |
Output is correct |
| 4 |
Correct |
294 ms |
29036 KB |
Output is correct |
| 5 |
Correct |
698 ms |
44252 KB |
Output is correct |
| 6 |
Correct |
1532 ms |
92276 KB |
Output is correct |
| 7 |
Correct |
21 ms |
32004 KB |
Output is correct |
| 8 |
Correct |
20 ms |
30592 KB |
Output is correct |
| 9 |
Correct |
5 ms |
588 KB |
Output is correct |
| 10 |
Correct |
3 ms |
332 KB |
Output is correct |
| 11 |
Correct |
20 ms |
31468 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1484 KB |
Output is correct |
| 13 |
Correct |
134 ms |
13400 KB |
Output is correct |
| 14 |
Correct |
82 ms |
9556 KB |
Output is correct |
| 15 |
Correct |
80 ms |
12080 KB |
Output is correct |
| 16 |
Correct |
56 ms |
5044 KB |
Output is correct |
| 17 |
Correct |
342 ms |
24772 KB |
Output is correct |
| 18 |
Correct |
314 ms |
31600 KB |
Output is correct |
| 19 |
Correct |
284 ms |
28980 KB |
Output is correct |
| 20 |
Correct |
251 ms |
22040 KB |
Output is correct |
| 21 |
Correct |
664 ms |
43380 KB |
Output is correct |
| 22 |
Correct |
678 ms |
44432 KB |
Output is correct |
| 23 |
Correct |
662 ms |
35960 KB |
Output is correct |
| 24 |
Correct |
647 ms |
40872 KB |
Output is correct |
| 25 |
Correct |
1346 ms |
78444 KB |
Output is correct |
| 26 |
Correct |
1068 ms |
118856 KB |
Output is correct |
| 27 |
Correct |
1403 ms |
105048 KB |
Output is correct |
| 28 |
Correct |
1516 ms |
92044 KB |
Output is correct |
| 29 |
Correct |
1536 ms |
90532 KB |
Output is correct |
| 30 |
Correct |
1442 ms |
94856 KB |
Output is correct |
| 31 |
Correct |
1070 ms |
63452 KB |
Output is correct |
| 32 |
Correct |
1363 ms |
90356 KB |
Output is correct |
