import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.io.BufferedOutputStream;
import java.util.function.LongPredicate;
import java.util.function.Predicate;
import java.util.List;
import java.io.*;
import java.util.*;
import java.io.PrintWriter;

public class Main {
    public static void main(final String[] args) {
    	Scanner scanner = new Scanner(System.in);
    	int n = scanner.nextInt();
    	System.out.println((n+1)/2);

    }
}

/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