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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int n, k;cin>>n>>k;
  7. 	vector<int> arr(n,0);
  8. 	for(int i = 0;i<n;i++){
  9. 		cin>>arr[i];
  10. 	}
  11.  
  12. 	//create a adjacency list of value by positions
  13. 	unordered_map<int, vector<int>>mpp;
  14. 	for(int i = 0;i<n;i++){
  15. 		mpp[arr[i]].push_back(i);
  16. 	}
  17.  
  18. 	int ans = 0;
  19. 	for (auto &p : mpp) {
  20. 	    vector<int>& indexList = p.second;
  21. 	    int size = indexList.size();
  22.  
  23. 	    int i = 0;
  24. 	    for (int j = 0; j < size; j++) {
  25. 	        while (i <= j && (indexList[j] - indexList[i] - (j - i)) > k) {
  26. 	            i++;
  27. 	        }
  28. 	        ans = max(ans, j - i + 1); 
  29. 	    }
  30. 	}
  31.  
  32. 	cout<<ans<<endl;
  33.  
  34. 	return 0;
  35. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
6 2
4 4 4 2 4 4
stdout 
5
https://ideone.com/Ol9iE7
Rippling OA
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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