import java.util.*;

class Main{
  Scanner sc = new Scanner(System.in);
  
  public static void main(String[] args) {
    
    new Main().run();
    
  }
  
  void run() {
    int n = sc.nextInt();
    System.out.print( (n + 1) / 2 );
  }
  
}
  

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz