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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. bool isprime(int n){
  5. 	for(int i=2;i*i<=n;i++){
  6. 		if(n % i == 0)	return false;
  7. 	}
  8. 	return true;
  9. }
  10. int main(){
  11. 	ios_base::sync_with_stdio(0); cin.tie(0);
  12. 	int n;
  13. 	cin >> n;
  14. 	if(n % 2  == 0)	cout << n - 4 << " 4";
  15. 	else{
  16. 		int ans1 = 2, ans2 = 0;
  17. 		while(ans1 < (n+1)/2){
  18. 			ans1 += 2;
  19. 			// bool check = isprime(n-ans1);
  20. 			// cout << check << endl;
  21. 			if(!isprime(n-ans1)){
  22. 				ans2 = n - ans1;
  23. 				cout << ans1 << " " << ans2;
  24. 				break;
  25. 			}
  26. 		}
  27. 	}
  28. 	return 0;
  29. }
Success #stdin #stdout 0.01s 5268KB
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https://ideone.com/f8dd1N
language:
C++14 (clang 8.0)
created:
19 days ago
visibility:
public

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