/**
* If you live in imaginary world when your imaginary situation encounter in
* real situation you can't enjoiy it because you have to do pending work.
* {This pending work appeared because you wasted that time for your useless
* imagianry thinking .}
*/
#include<bits/stdc++.h>
using namespace std;
//#define int int64_t
#define all(x) x.begin(),x.end()
#define all1(x) x.rbegin(),x.rend()
#define sz(x) (int)(x.size())
const int N=4e5+5,mod=1e9+7;
void solve(){
int n,m;
cin>>n>>m;
vector<string> z(n);
for (string &it:z){cin>>it;}
int ans=0;
deque<pair<int,int>> q;
vector<vector<int>> dis(n,vector<int>(n));
dis[0][0]=1;
q.emplace_back(0,0);
vector<int> dx{1,-1,0,0},dy{0,0,1,-1};
while(!q.empty()){
pair<int,int> u=q.front();
q.pop_front();
ans=max(ans,dis[u.first][u.second]);
for (int i=0;i<4;i++){
int x=u.first+dx[i],y=u.second+dy[i];
if (min(x,y)>=0 && x<n && y<m && z[x][y]!='.' && dis[x][y]==0){
if (z[u.first][u.second]==z[x][y]){
q.emplace_front(x,y);
dis[x][y]=dis[u.first][u.second];
}
else{
q.emplace_back(x,y);
dis[x][y]=dis[u.first][u.second]+1;
}
}
}
}
cout<<ans;
}
int32_t main(){
ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
int tq=1;
//cin>>tq;
for (;tq;tq--){solve();}
}
//is a bruteforce possible?
//think greedier, make more assumptions
// if we you find solution using loop to decrease complexity use bs
//stuck for more than 5 minutes? move on
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
1740 KB |
Output isn't correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
308 KB |
Output is correct |
| 4 |
Correct |
6 ms |
1740 KB |
Output is correct |
| 5 |
Correct |
2 ms |
836 KB |
Output is correct |
| 6 |
Correct |
0 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
2 ms |
708 KB |
Output is correct |
| 11 |
Correct |
2 ms |
580 KB |
Output is correct |
| 12 |
Correct |
5 ms |
844 KB |
Output is correct |
| 13 |
Correct |
2 ms |
716 KB |
Output is correct |
| 14 |
Correct |
2 ms |
716 KB |
Output is correct |
| 15 |
Correct |
7 ms |
1864 KB |
Output is correct |
| 16 |
Incorrect |
9 ms |
1740 KB |
Output isn't correct |
| 17 |
Correct |
6 ms |
1712 KB |
Output is correct |
| 18 |
Correct |
5 ms |
1740 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
23 ms |
57804 KB |
Output is correct |
| 2 |
Correct |
32 ms |
9692 KB |
Output is correct |
| 3 |
Correct |
186 ms |
96520 KB |
Output is correct |
| 4 |
Incorrect |
56 ms |
21932 KB |
Output isn't correct |
| 5 |
Correct |
104 ms |
54212 KB |
Output is correct |
| 6 |
Correct |
536 ms |
110240 KB |
Output is correct |
| 7 |
Correct |
29 ms |
63164 KB |
Output is correct |
| 8 |
Correct |
35 ms |
57644 KB |
Output is correct |
| 9 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 10 |
Incorrect |
0 ms |
332 KB |
Output isn't correct |
| 11 |
Correct |
25 ms |
60900 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
33 ms |
9564 KB |
Output is correct |
| 14 |
Incorrect |
20 ms |
5452 KB |
Output isn't correct |
| 15 |
Correct |
13 ms |
6316 KB |
Output is correct |
| 16 |
Incorrect |
2 ms |
2252 KB |
Output isn't correct |
| 17 |
Correct |
81 ms |
24568 KB |
Output is correct |
| 18 |
Correct |
50 ms |
24164 KB |
Output is correct |
| 19 |
Incorrect |
46 ms |
21896 KB |
Output isn't correct |
| 20 |
Incorrect |
12 ms |
19404 KB |
Output isn't correct |
| 21 |
Correct |
104 ms |
57208 KB |
Output is correct |
| 22 |
Correct |
100 ms |
54260 KB |
Output is correct |
| 23 |
Incorrect |
142 ms |
41076 KB |
Output isn't correct |
| 24 |
Correct |
101 ms |
57156 KB |
Output is correct |
| 25 |
Correct |
268 ms |
96496 KB |
Output is correct |
| 26 |
Correct |
291 ms |
123920 KB |
Output is correct |
| 27 |
Correct |
420 ms |
123044 KB |
Output is correct |
| 28 |
Correct |
495 ms |
110224 KB |
Output is correct |
| 29 |
Correct |
521 ms |
108512 KB |
Output is correct |
| 30 |
Correct |
451 ms |
111076 KB |
Output is correct |
| 31 |
Correct |
421 ms |
62132 KB |
Output is correct |
| 32 |
Correct |
332 ms |
111844 KB |
Output is correct |
