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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. string tab[2005];
  5. int ile[2005];
  6. int sito[2005];
  7.  
  8.  
  9.  
  10.  
  11. int main()
  12. {
  13. 	sito[1] = 1;
  14. 	sito[0] = 1;
  15. 	for(int i = 2;i <= 2000;++i)
  16. 	{
  17. 		if(sito[i] == 0)
  18. 		{
  19. 			for(int j = i;j <= 2000;j += i)
  20. 			{
  21. 				sito[j] = i;
  22. 			}
  23. 		}
  24. 	}
  25. 	tab[1] = "";
  26. 	string slo;
  27. 	for(int i = 2;i <= 2000;++i)
  28. 	{
  29. 		slo = "";
  30. 		vector<int> czyn(11);
  31. 		int x= i;
  32. 		while(x > 1)
  33. 		{
  34. 			czyn[sito[x]]++;
  35. 			x /= sito[x];
  36. 			//cout << 1;
  37. 		}
  38. 		while(czyn[2]%3 == 0 && czyn[2] >= 3)
  39. 		{
  40. 			ile[i]++;
  41. 			slo += "8[";
  42. 			czyn[2] -= 3;
  43. 		}
  44. 		while(czyn[2]%2 == 0 && czyn[2] >= 2)
  45. 		{
  46. 			ile[i]++;
  47. 			slo += "4[";
  48. 			czyn[2] -= 2;
  49. 		}	
  50. 		while(czyn[2] > 0)
  51. 		{
  52. 			ile[i]++;
  53. 			slo += "2[";
  54. 			czyn[2]--;
  55. 		}
  56. 		while(czyn[3]%2 == 0 && czyn[3] >= 2)
  57. 		{
  58. 			ile[i]++;
  59. 			slo += "9[";
  60. 			czyn[3] -= 2;
  61. 		}
  62. 		while(czyn[3] > 0)
  63. 		{
  64. 			ile[i]++;
  65. 			slo += "3[";
  66. 			czyn[3]--;
  67. 		}
  68. 		while(czyn[5] > 0)
  69. 		{
  70. 			ile[i]++;
  71. 			slo += "5[";
  72. 			czyn[5]--;
  73. 		}
  74. 		while(czyn[7] > 0)
  75. 		{
  76. 			ile[i]++;
  77. 			slo += "7[";
  78. 			czyn[7]--;
  79. 		}
  80. 		tab[i] = slo;
  81. 	}
  82. }
  83.  
Success #stdin #stdout 0.01s 5276KB
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https://ideone.com/BBzfWN
language:
C++14 (gcc 8.3)
created:
11 days ago
visibility:
public

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