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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6.     int n;
  7.  
  8.     cin >> n;
  9.  
  10.     cout << ceil(log2(n));
  11.  
  12. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/DcjAcs
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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