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Oct 23rd, 2014
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  1. #include<stdio.h>
  2. #include<math.h>
  3.  
  4. int main()
  5. {
  6. int n;
  7. int c;
  8. c = 0;
  9. int ch = 0;
  10. scanf("%d", &n);
  11. printf("2\n");
  12. for(int i = 3; i < n; i++)
  13. {
  14. c = 0;
  15. int x = (int)sqrt(i);
  16. for(int k = 2; k < x; k++)
  17. {
  18. ch++;
  19. if(i % k == 0) {
  20. c = 1;
  21. break;
  22. }
  23. }
  24. if(c == 0)
  25. {
  26. printf("%d\n", i);
  27. }
  28. }
  29. printf("%d", ch);
  30. return 0;
  31. }
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