import java.io.*;
import java.util.*;

class Main
{
  public static void main (String[] arg)
  {
    Scanner scan = new Scanner(System.in);
    int n = Integer.parseInt(scan.next()); //整数
    
    int m = n / 2;
    
    if(n % 2 == 1){
      m++;
    }
    
    System.out.println(m);
  }
}
/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