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  1. #include <iostream>
  2. #include<vector>
  3. #include<unordered_map>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	vector<int> arr={1,1,2,2,2,1};
  8. 	int dist=0;
  9. 	int maxDist=0;
  10. 	unordered_map<int,int> d;
  11. 	for(int i=0;i<arr.size();i++) {
  12. 		if(d.find(arr[i])!=d.end()) {
  13. 			dist=i-d[arr[i]];
  14. 			maxDist=max(maxDist,dist);
  15. 		}
  16. 		else {
  17. 			d[arr[i]]=i;
  18. 		}
  19. 	}
  20. 	cout<<dist<<endl;
  21. 	return 0;
  22. }
Success #stdin #stdout 0.01s 5312KB
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https://ideone.com/ybz0Um
language:
C++14 (gcc 8.3)
created:
12 hours ago
visibility:
public

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