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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long input = 600851475143;
  6. 	long long mx = 0;
  7. 	for (int x = 2; x <= input/x; ++x){
  8. 		while(input%x==0) {input/=x; mx = x; }
  9.  
  10. 	}
  11. 	if (input > 1){
  12. 		mx = input;
  13. 	}
  14. 	cout << mx << endl;
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3468KB
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6857
https://ideone.com/RoAmHd
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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