#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int,int> pii;
typedef pair<long long, long long> pll;
using namespace std;
int n, m;
char mat[4001][4001];
bool vis[4001][4001];
int dist[4001][4001], dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
bool in_range(int i, int j){
if(i >= 0 && j >= 0 && i < n && j < m) return true;
return false;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n>>m;
for(int i = 0; i < n; i++)
for(int j = 0; j < m; j++)
cin>>mat[i][j];
priority_queue<pair<int, pii>> q;
q.push(mp(0, mp(0, 0)));
int ans = 1;
dist[0][0] = vis[0][0] = 1;
while(!q.empty()){
pii at = q.top().second;
q.pop();
ans = max(ans, dist[at.first][at.second]);
for(int dir = 0; dir < 4; dir++){
int nx = at.first + dx[dir], ny = at.second + dy[dir];
if(in_range(nx, ny) && mat[nx][ny] != '.' && !vis[nx][ny]){
vis[nx][ny] = true;
dist[nx][ny] = dist[at.first][at.second] + (mat[at.first][at.second] != mat[nx][ny]);
q.push(mp(-dist[nx][ny], mp(nx,ny)));
}
}
}
cout<<ans<<endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
41 ms |
7204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
852 KB |
Output is correct |
| 4 |
Correct |
26 ms |
7160 KB |
Output is correct |
| 5 |
Correct |
5 ms |
3924 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
852 KB |
Output is correct |
| 8 |
Correct |
1 ms |
980 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 10 |
Correct |
6 ms |
3412 KB |
Output is correct |
| 11 |
Correct |
7 ms |
2900 KB |
Output is correct |
| 12 |
Correct |
15 ms |
4200 KB |
Output is correct |
| 13 |
Correct |
5 ms |
3924 KB |
Output is correct |
| 14 |
Correct |
5 ms |
3924 KB |
Output is correct |
| 15 |
Correct |
33 ms |
6968 KB |
Output is correct |
| 16 |
Correct |
41 ms |
7232 KB |
Output is correct |
| 17 |
Correct |
20 ms |
6848 KB |
Output is correct |
| 18 |
Correct |
27 ms |
7136 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
45716 KB |
Output is correct |
| 2 |
Correct |
110 ms |
18484 KB |
Output is correct |
| 3 |
Correct |
397 ms |
73344 KB |
Output is correct |
| 4 |
Correct |
131 ms |
36380 KB |
Output is correct |
| 5 |
Correct |
182 ms |
56260 KB |
Output is correct |
| 6 |
Execution timed out |
2087 ms |
114320 KB |
Time limit exceeded |
| 7 |
Correct |
20 ms |
47836 KB |
Output is correct |
| 8 |
Correct |
19 ms |
45640 KB |
Output is correct |
| 9 |
Correct |
5 ms |
724 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
19 ms |
46804 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2132 KB |
Output is correct |
| 13 |
Correct |
110 ms |
18472 KB |
Output is correct |
| 14 |
Correct |
63 ms |
13096 KB |
Output is correct |
| 15 |
Correct |
25 ms |
15956 KB |
Output is correct |
| 16 |
Correct |
61 ms |
6928 KB |
Output is correct |
| 17 |
Correct |
282 ms |
32628 KB |
Output is correct |
| 18 |
Correct |
112 ms |
39536 KB |
Output is correct |
| 19 |
Correct |
131 ms |
36336 KB |
Output is correct |
| 20 |
Correct |
104 ms |
29084 KB |
Output is correct |
| 21 |
Correct |
253 ms |
55628 KB |
Output is correct |
| 22 |
Correct |
184 ms |
56264 KB |
Output is correct |
| 23 |
Correct |
546 ms |
46208 KB |
Output is correct |
| 24 |
Correct |
154 ms |
53068 KB |
Output is correct |
| 25 |
Correct |
510 ms |
94284 KB |
Output is correct |
| 26 |
Correct |
1395 ms |
82680 KB |
Output is correct |
| 27 |
Execution timed out |
2075 ms |
96700 KB |
Time limit exceeded |
| 28 |
Execution timed out |
2044 ms |
114392 KB |
Time limit exceeded |
| 29 |
Execution timed out |
2078 ms |
105912 KB |
Time limit exceeded |
| 30 |
Execution timed out |
2087 ms |
102592 KB |
Time limit exceeded |
| 31 |
Correct |
1886 ms |
76232 KB |
Output is correct |
| 32 |
Correct |
1927 ms |
95508 KB |
Output is correct |
