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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cmath>
  4. #include <map>
  5. #define lli long long int
  6. #define inf 10000000001
  7. using namespace std;
  8. int count[1000001];
  9. int store[88888];
  10. int main() {
  11. 	int p = 2,d = 0;
  12. 	lli n = sqrt(inf);
  13. 	while (p <= n) {
  14. 		store[d++] = p;
  15. 		for (lli j = 2; j <= n/p; j++) {
  16. 			count[p*j] = 1;
  17. 		}
  18. 		int l;
  19. 		for (l = p + 1; l <= n; l++) {
  20. 			if (count[l] == 0) {
  21. 				p = l;
  22. 				break;
  23. 			}
  24. 		}
  25. 		if (l == n + 1) {
  26. 			break;
  27. 		}
  28. 	}
  29. 	int t;
  30. 	scanf("%d",&t);
  31. 	while (t--) {
  32. 	int l,r,x = 0,ct = 0;
  33. 	scanf("%d %d",&l,&r);
  34. 	map <int,int> m1;
  35. 	p = store[x];
  36. 	while (x < d && p <= sqrt(r)) {
  37. 		int z = l/p;
  38. 		if (l % p == 0) {
  39. 			m1[l] = 1;
  40. 		}
  41. 		if (l <= p) {
  42. 			z = 1;
  43. 		}
  44. 		for (int i = z+1; i <= r/p; i++) {
  45. 			m1[p*i] = 1;
  46. 		}
  47. 		p = store[++x];
  48. 	}
  49. 	for (int i = l; i <= r; i++) {
  50. 		if (i == 1) {
  51. 			continue;
  52. 		}
  53. 		if (m1[i] == 0) {
  54. 			printf("%d\n",i);
  55. 		}
  56. 	}
  57. 	printf("\n");
  58.     }
  59. 	return 0;
  60. }
Runtime error #stdin #stdout 0.03s 7400KB
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https://ideone.com/JiSxel
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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