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  1. #include <iostream>
  2. #include <unordered_map>
  3. #include <unordered_set>
  4. #include <algorithm>
  5. #include <cmath>
  6. #include <cstdio>
  7. #include <vector>
  8. #include <queue>
  9. #include <deque>
  10. #include <stack>
  11. #include <set>
  12. #include <map>
  13. #define Fast std::ios_base::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);
  14. #define ll long long 
  15. using namespace std;
  16.  
  17. // 10 5 5 5 ---> 5 my code will get 10
  18. // if we sorted the array  will this solve the issue ? nope
  19. // 6 9 --> 3 my code (6)
  20. // i want to pick a number that includes a prime factor from each number 
  21.  
  22.  
  23.  
  24.  
  25. // 15 primes till 50
  26. int primes[] = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47};
  27.  
  28. void solve() {
  29. 	int n; cin >> n;
  30. 	unordered_set<int> s;
  31. 	vector<int> v(n);
  32. 	for (int i = 0; i < n; i++) {
  33. 		cin >> v[i];
  34. 	}
  35. 	for (int i = 0; i < n; i++) {
  36.  
  37. 		for (int j = 0; j < 15; j++) {
  38. 			if (v[i] % primes[j] == 0) {
  39. 			    s.insert(primes[j]);
  40. 				break;
  41. 			}
  42. 		}
  43.  
  44. 	}
  45.  
  46. 	long long ans = 1;
  47. 	for (auto x : s) {
  48. 		ans *= x;
  49. 	}
  50. 	cout << ans << endl;
  51. }
  52.  
  53. int main() {
  54. 	Fast;
  55. 	/*FILE* stream;
  56. 	freopen_s(&stream, "input.txt", "r", stdin);
  57. 	freopen_s(&stream, "output.txt", "w", stdout);*/
  58. 	int t;
  59. 	cin >> t;
  60.  
  61. 	while (t--) {
  62. 		solve();
  63. 	}
  64.  
  65.  
  66.  
  67. }
Success #stdin #stdout 0.1s 5280KB
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https://ideone.com/Ejo30N
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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