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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. bool prime(int num) {
  6. 	for (int i = 2; i <= sqrt(num); i++) {
  7. 		if (num % i == 0) return false;
  8. 	}
  9.  
  10. 	return true;
  11. }
  12.  
  13. int main() {
  14. 	ios::sync_with_stdio(false);
  15. 	cin.tie(0);
  16.  
  17. 	int n;
  18. 	cin >> n;
  19.  
  20. 	for (int i = 3; i < n / 2; i++) {
  21. 		if (prime(i) && prime(n - i)) {
  22. 			cout << i << " " << n - i;
  23. 			break;
  24. 		}
  25. 	}
  26.  
  27. 	return 0;
  28. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/t83PHv
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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