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Sep 20th, 2019
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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. int prim(int x)
  5. {
  6. nr= 0;
  7. for(int i= 2; i<= x/ 2; i++)
  8. if(x% i== 0)
  9. nr= 1;
  10. return nr;
  11. }
  12. void numar( int x, int &nrp)
  13. {
  14. nrp= 0;
  15. for( int i= x; i> 0; i--)
  16. if(prim(i)== 1)
  17. nrp++;
  18. }
  19. return nrp;
  20.  
  21. int main()
  22. {
  23. cin>> a>> b;
  24. ok= 0;
  25. numar( b,0)
  26. for(int i= a; i<= b; i++)
  27. {
  28. numar(i, nrp);
  29. if(nrp!= 0)
  30. {
  31. ok= 1;
  32. break;
  33. }
  34. }
  35. if(ok== 1)
  36. cout<<"DA";
  37. else
  38. cout<<"NU";
  39. return 0;
  40. }
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