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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long n;
  6. 	cin>>n;
  7. 	int sum=0;
  8. 	for(int i=1;i<=n;i++)
  9. 	{
  10. 		sum+=i;
  11. 	}
  12. 	cout<<sum;
  13. 	return 0;
  14. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/3uxes7
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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