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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long int n;
  6. 	cin >> n;
  7. 	long int result;
  8. 	result = n*(n + 1)*(2*n + 1)/6;
  9. 	cout << result;
  10. 	return 0;
  11. }
Success #stdin #stdout 0s 4492KB
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https://ideone.com/QxKxiQ
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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