import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {
    public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); //コンソールから入れる際に高速に入れる方法

        String strArr = br.readLine();
        int a = Integer.parseInt(strArr);
        if (a % 2 == 1) {
        	int x = (a/2) + 1;
            System.out.println(x);
        } else {
        	System.out.println(a/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