import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
public class Main  
{ 
    public static void main(String[] args) throws IOException  
    { 
        //Enter data using BufferReader 
        BufferedReader reader =  
                   new BufferedReader(new InputStreamReader(System.in)); 
         
        // Reading data using readLine 
        String input = reader.readLine(); 
      	int n = Integer.valueOf(input);
      	int res = n % 2 == 0 ? n / 2 : n /2 + 1;
  
        // Printing the read line 
        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