text: #include <iostream> 
  #include <chrono> 
  
  using namespace std;
  
  int fibonacci(int n) {
      if (n <= 1)
          return n;
      return fibonacci(n - 1) + fibonacci(n - 2);
  }
  
  int main() {
      for (int i = 0; i < 100; i++) {
          auto startTime = chrono::high_resolution_clock::now().time_since_epoch();
          int result = fibonacci(12);
          auto totalTime = chrono::high_resolution_clock::now().time_since_epoch() - startTime;
          cout << totalTime << "\n";
      } 
  }