fork download
copy 
  1. #include<iostream>
  2. #include<unordered_set>
  3. #include<vector>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8. 	unordered_set<int> cnt;
  9. 	int n;
  10. 	cin >> n;
  11. 	vector<int> x(n);
  12. 	for(int i = 0; i < n; i++) {
  13. 		cin >> x[i];
  14. 	}
  15. 	long long ans = 0;
  16. 	int l = 0;
  17. 	for(int r = 0; r < n; r++) {
  18. 		while(cnt.count(x[r])) {
  19. 			cnt.erase(x[l++]);
  20. 		}
  21. 		cnt.insert(x[r]);
  22. 		ans += r - l + 1;
  23. 	}
  24. 	cout << ans << '\n';
  25. 	return 0;
  26. }
  27.  
Success #stdin #stdout 0s 5316KB
comments (?)
stdin
copy 
4
1 2 1 3
stdout
copy 
8
https://ideone.com/8Codc6
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!