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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long n;
  6.     cin>>n;
  7.     long long m =n/2;
  8.     cout<<m *(m + 1)<<endl;
  9. 	return 0;
  10. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/PD1gIc
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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