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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. int a,b,c,d,e,f,g,h;
  5. int main() {
  6. 	cin>>a;
  7. 	for(int i=1; i<=a; i++) {
  8. 		b=((i*(i+1))/2);
  9. 		c=c+b;
  10. 	}
  11. 	cout<<c;
  12. 	return 0;
  13. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/hrKHFM
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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