import java.util.*;
import static java.lang.System.*;
import java.math.*;
 
public class Main{
  public static void main(final String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(N%2==0){
      out.print(N/2);
    }
     else{
       out.print(N/2+1);
     }
  }
  }


/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