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Feb 18th, 2020
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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. const int N = 1e7 + 3;
  6.  
  7. int n, a[N] = {0}, amax = 0, b[N] = {0};
  8. int prime[N];
  9.  
  10. void Sieve() {
  11. for (int i = 2; i <= (int) 1e7; ++i) prime[i] = i;
  12. for (int i = 2; i <= (int) 1e7; ++i) {
  13. if (prime[i] == i) {
  14. for (int j = 2; i * j <= (int) 1e7; ++j) {
  15. prime[i * j] = min(prime[i * j], i);
  16. }
  17. }
  18. }
  19. }
  20.  
  21. void Fac(int x) {
  22. while (x > 1) {
  23. int k = prime[x];
  24. while (x % k == 0) x /= k;
  25. //cerr << k << ' ';
  26. ++b[k];
  27. }
  28. }
  29.  
  30. int main() {
  31. scanf("%d", &n);
  32. Sieve();
  33. for (int i = 0; i < n; ++i) {
  34. int x; scanf("%d", &x);
  35. Fac(x);
  36. }
  37. int m; scanf("%d", &m);
  38. for (int i = 1; i <= int(1e7); ++i) b[i] = b[i - 1] + b[i];
  39. while (m--) {
  40. int l, r; scanf("%d%d", &l, &r);
  41. r = min(r, (int) 1e7);
  42. if (l > r) printf("0\n"); else
  43. printf("%d\n", b[r] - b[l - 1]);
  44. }
  45. return 0;
  46. }
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