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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.  
  5. bool isPowerOf3 (int n) {
  6. 	// edge case
  7. 	if (n <= 0) { 
  8. 		return false;
  9. 	}
  10.  
  11. 	while(n % 3 == 0){
  12. 		n /= 3;
  13. 	}
  14.  
  15. 	return n == 1;
  16. }
  17.  
  18. int main() {
  19.  
  20. 	int n;
  21. 	cin>>n;
  22.  
  23. 	bool decision = isPowerOf3(n);
  24.  
  25. 	if(decision){
  26. 		cout<<"True\n";
  27. 	} else {
  28. 		cout<<"False\n";
  29. 	}
  30.  
  31.  
  32. 	return 0;
  33. }
Success #stdin #stdout 0s 5284KB
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https://ideone.com/F0XB1H
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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