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SalmaYasser

Untitled

Nov 7th, 2019
103
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  1. bool fun(int n)
  2. {
  3. int x = (int)(sqrt(n));
  4.  
  5. if (x*(x+1)==n)
  6.  
  7. return true;
  8. else
  9. return false;
  10. }
  11.  
  12.  
  13. int main()
  14. {
  15. int a = 6 , b = 20;
  16. int res = 0;
  17. for (int i = a ; i <= b ; i++)
  18. if (fun(i))
  19. res++;
  20. return res;
  21.  
  22.  
  23. }
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