Lucian_Adrian

Untitled

Oct 19th, 2021
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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. int n;
  8. long long S = 0;
  9. cin>>n;
  10. for(int i = 1; i * i <= n; ++i){
  11. if(n % i == 0){
  12. if(i % 2 == 0)
  13. S += i;
  14. if(n / i % 2 == 0)
  15. S += n / i; }
  16. if(i * i == n && i % 2 == 0)
  17. S -= i; }
  18. cout<<S;
  19. return 0;
  20. }
  21.  
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