import java.util.*;
 
public class Main {
	public static void main(String[] args) {
      	int res = 0;
		Scanner sc = new Scanner(System.in);
		String input_line = sc.nextLine();
        int num = Integer.parseInt(input_line);
      
        if(num ==1){
          res = 1;
        }
        else if(num % 2 == 0){
          res = num / 2;
        }
        else{
          res = (int)num / 2 + 1;
        }
        System.out.println(res);
    }
}
/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