import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int m = scanner.nextInt();
int[] arr = {64, 16, 4, 1};
int sub = 1024 - m;
int n = 0;
while (sub > 0) {
for (int i :
arr) {
n = n + sub / i;
sub = sub - (sub / i) * i;
}
}
System.out.println(n);
}
}