import java.util.*;


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


public class Main {
    public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int line = sc.nextInt();
		int sum = 0;
		if (line % 2 == 0) {
		    sum += line / 2;
		} else {
		    sum += line / 2 + 1;
		}
		
		System.out.println(sum);
    }
}

