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  1. #include <iostream>
  2. #include <vector>
  3. #include <unordered_map>
  4. using namespace std;
  5.  
  6. void add(unordered_map <int, int>& m, int num, int plus) {
  7. 	if(!m[num]) {
  8. 		m[num] = 0;
  9. 	} 
  10.  
  11. 	m[num] += plus;
  12. }
  13.  
  14. unordered_map <int, int> rasklad(int n) {
  15. 	unordered_map <int, int> res;
  16.  
  17. 	while (n % 2 == 0) {
  18. 		n /= 2;
  19. 		add(res, 2, 1);
  20.  
  21. 	}
  22.  
  23. 	while (n % 3 == 0) {
  24. 		n /= 3;
  25. 		add(res, 3, 1);
  26. 	}
  27.  
  28. 	for (int i = 5; i * i <= n; i += 6) {
  29. 		while (n % i == 0) {
  30. 			n /= i;
  31. 			add(res, i, 1);
  32. 		}
  33. 	}
  34.  
  35. 	return res;
  36. }
  37.  
  38. int main() {
  39. 	int n, m;
  40. 	cin >> n >> m;
  41.  
  42. 	unordered_map <int, int> n_r = rasklad(n);
  43. 	unordered_map <int, int> m_r = rasklad(m);
  44. 	int res = 0;
  45.  
  46. 	for (auto i : m_r) {
  47. 		add(n_r, i.first, -i.second);
  48. 	}
  49.  
  50. 	for (auto i : n_r) {
  51. 		res += abs(i.second);
  52. 	}
  53.  
  54. 	cout << res;	
  55.  
  56. 	return 0;
  57. }
Success #stdin #stdout 0.01s 5268KB
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stdout
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Standard output is empty
https://ideone.com/1zdrIa
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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