#include <bits/stdc++.h>
using namespace std;
constexpr int M = 4005;
int kolor[M][M];
char tab[M][M];
int spojna[M*4];
int xx[4] = {0, 0, -1, 1};
int yy[4] = {1, -1, 0, 0};
int n, m;
bool isValid(int x, int y){
if(1>x || x>n) return 0;
if(1>y || y>m) return 0;
if(tab[x][y]=='.') return 0;
if(kolor[x][y]!=0) return 0;
return 1;
}
int maks = 0;
void bfs(){
queue<pair<int, int>> q;
queue<pair<pair<int, int>, int>> next;
q.push({1, 1});
kolor[1][1] = 1;
while(!q.empty() || !next.empty()){
int aktWart = 1;
if(q.empty()==1){
pair<int, int> temp = next.front().first;
kolor[temp.first][temp.second] = next.front().second;
next.pop();
q.push(temp);
}
pair<int, int> p = q.front();
aktWart = kolor[p.first][p.second];
maks = max(maks, aktWart);
q.pop();
for(int i=0; i<4; i++){
int nx = xx[i] + p.first;
int ny = yy[i] + p.second;
if(isValid(nx, ny)){
if(tab[nx][ny]==tab[p.first][p.second]){
kolor[nx][ny] = aktWart;
q.push({nx, ny});
}
else{
next.push({{nx, ny}, kolor[p.first][p.second] + 1});
}
}
}
}
}
int main(){
cin.tie(0)->sync_with_stdio(0);
cin>>n>>m;
for(int i=1; i<=n; i++){
for(int j=1; j<=m; j++){
cin>>tab[i][j];
}
}
bfs();
cout<<maks<<endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
21 ms |
7504 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 4 |
Correct |
9 ms |
7368 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5720 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2512 KB |
Output is correct |
| 7 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 8 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 9 |
Correct |
2 ms |
4688 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5468 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5468 KB |
Output is correct |
| 12 |
Correct |
8 ms |
6076 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5724 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5724 KB |
Output is correct |
| 15 |
Correct |
20 ms |
7260 KB |
Output is correct |
| 16 |
Correct |
21 ms |
7728 KB |
Output is correct |
| 17 |
Correct |
12 ms |
7260 KB |
Output is correct |
| 18 |
Correct |
10 ms |
7516 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
32348 KB |
Output is correct |
| 2 |
Correct |
62 ms |
18232 KB |
Output is correct |
| 3 |
Correct |
332 ms |
73516 KB |
Output is correct |
| 4 |
Correct |
82 ms |
35156 KB |
Output is correct |
| 5 |
Correct |
180 ms |
55860 KB |
Output is correct |
| 6 |
Correct |
859 ms |
123264 KB |
Output is correct |
| 7 |
Correct |
11 ms |
32856 KB |
Output is correct |
| 8 |
Correct |
10 ms |
32224 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2588 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
10 ms |
32600 KB |
Output is correct |
| 12 |
Correct |
1 ms |
4956 KB |
Output is correct |
| 13 |
Correct |
61 ms |
18240 KB |
Output is correct |
| 14 |
Correct |
36 ms |
12884 KB |
Output is correct |
| 15 |
Correct |
24 ms |
15056 KB |
Output is correct |
| 16 |
Correct |
31 ms |
8028 KB |
Output is correct |
| 17 |
Correct |
151 ms |
31060 KB |
Output is correct |
| 18 |
Correct |
91 ms |
37748 KB |
Output is correct |
| 19 |
Correct |
84 ms |
35156 KB |
Output is correct |
| 20 |
Correct |
79 ms |
28496 KB |
Output is correct |
| 21 |
Correct |
199 ms |
54464 KB |
Output is correct |
| 22 |
Correct |
180 ms |
55632 KB |
Output is correct |
| 23 |
Correct |
300 ms |
45928 KB |
Output is correct |
| 24 |
Correct |
180 ms |
51612 KB |
Output is correct |
| 25 |
Correct |
448 ms |
94464 KB |
Output is correct |
| 26 |
Correct |
645 ms |
83016 KB |
Output is correct |
| 27 |
Correct |
762 ms |
97740 KB |
Output is correct |
| 28 |
Correct |
825 ms |
123336 KB |
Output is correct |
| 29 |
Correct |
804 ms |
122984 KB |
Output is correct |
| 30 |
Correct |
744 ms |
116812 KB |
Output is correct |
| 31 |
Correct |
887 ms |
77744 KB |
Output is correct |
| 32 |
Correct |
837 ms |
97632 KB |
Output is correct |
