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  1. #include<iostream>
  2. #include<unordered_set>
  3. using namespace std;
  4. int CountDistinctArrays(int arr[], int n) {
  5.  	unordered_set<int>s;
  6.     int j = 0, ans = 0;
  7.     for(int i=0;i<n;i++){
  8.         while(j<n && s.find(arr[j])==s.end()){
  9.            s.insert(arr[j]);
  10.             j++;
  11.         }
  12.         ans+=((j-i)*(j-i+1))/2;
  13.         s.erase(arr[i]);
  14.     }
  15.     return ans;
  16. }
  17. int main() {
  18. 	int n;
  19. 	cin>>n;
  20. 	int arr[n];
  21. 	for(int i=0;i<n;i++){
  22. 		cin>>arr[i];
  23. 	}
  24. 	int ans = CountDistinctArrays(arr,n);
  25. 	cout<<ans;
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 4436KB
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https://ideone.com/dtObCX
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
secret

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