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  1. #include <iostream>
  2. #include <vector>
  3. #include <cmath>
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.  
  10. int n, k;
  11. /*generate primes till 1000*/
  12. vector<bool> p(1001, true);
  13. p[0] = p[1] = false;
  14. vector<int> primes;
  15. int limit = sqrt(1000) + 1;
  16. for(int i=2; i<limit; i++) {
  17. if(p[i]) {
  18. for(int j=i*i; j<=1000; j+=i) {
  19. p[j] = false;
  20. }
  21. }
  22. }
  23. for(int i=2; i<=1000; i++) {
  24. if(p[i])
  25. primes.push_back(i);
  26. }
  27. /*solve the problem*/
  28. //freopen("0.txt", "r", stdin);
  29. //freopen("ans0.txt","w",stdout);
  30.  
  31. cin >> n;
  32. while(n--)
  33. {
  34. cin >> k;
  35. int count = 0;
  36. for(int i=0; i<primes.size() && primes[i] <= k; i++) {
  37. int v = primes[i];
  38. while(true) {
  39. if(v > k)
  40. break;
  41. count++;
  42. v *= primes[i];
  43. }
  44. }
  45. cout << count << endl;
  46. }
  47. return 0;
  48. }
Runtime error #stdin #stdout 0.11s 2820KB
stdin
Standard input is empty
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