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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7. 	unsigned long long t = 2;
  8. 	cout<<3*(t<<(n-1))-2;
  9. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/d8hHeI
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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