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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6. 	int n,k;
  7. 	cin>>n;
  8. 	int temp,temp2;
  9. 	string s="";
  10. 	int lol;
  11. 	for(temp=0;temp<n;temp++)
  12. 	{
  13. 		cin>>lol;
  14. 		s+=char(lol+48);
  15. 	}
  16. 	cin>>k;
  17. 	string target=s;
  18. 	sort(target.begin(),target.end());
  19. 	//cout<<target<<"\n";
  20. 	queue<pair<string,int>> q;
  21. 	q.push(make_pair(s,0));
  22. 	map<string,bool> visited;
  23. 	while(!q.empty())
  24. 	{
  25. 		string st=q.front().first;
  26. 		int cnt=q.front().second;
  27. 		q.pop();
  28. 		if(visited[st])	continue;
  29. 		visited[st]=true;
  30. 		if(st==target)
  31. 		{
  32. 			cout<<cnt<<"\n";
  33. 			return 0;
  34. 		}
  35. 		cnt++;
  36. 		for(temp=0;temp<=n-k;temp++)
  37. 		{
  38. 			string sst=st;
  39. 			int troll=0;
  40. 			for(temp2=temp;temp2<temp+k;temp2++)
  41. 			{
  42. 				sst[temp2]=st[temp+k-troll-1];
  43. 				troll++;
  44. 			}
  45. 			//cout<<sst<<" "<<cnt<<"\n";
  46. 			q.push(make_pair(sst,cnt));
  47. 		}
  48. 	}
  49. 	cout<<-1<<"\n";
  50. }
Success #stdin #stdout 0s 3424KB
comments (?)
stdin 
5
5 4 1 2 3
3
stdout 
3
https://ideone.com/SYJklC
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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