import java.util.Scanner;

class Main{

 public static void main(String[] args){

 Scanner scan = new Scanner(System.in);

 int N = scan.nextInt();  
   if (N % 2 == 0){
  int O = N / 2;
     System.out.println(O);
   }
   
   else{
     int P = N / 2 + 1;
   System.out.println(P);
   
   }
   
   
 }
}

/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