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a53

sir10

a53
Mar 7th, 2018
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0
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  1. #include <fstream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6. int r,n,i,s=0;
  7. ifstream f("sir10.in");
  8. f>>n;
  9. f.close();
  10. for(r=1;r<=n/2;++r)
  11. {
  12. i=n-2*r;
  13. while(i>0)
  14. s+=i,i-=r;
  15. }
  16. ofstream g("sir10.out");
  17. g<<s<<'\n';
  18. g.close();
  19. return 0;
  20. }
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