[Link] https://www.acmicpc.net/problem/1094
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import java.util.*;
import java.io.*;
public class Main {
static BufferedReader br;
static int n = 0;
static int[][] cost;
static int[][] dp;
public static void main(String[] args) throws IOException {
br = new BufferedReader(new InputStreamReader(System.in));
// StringBuilder sb = new StringBuilder();
int n = toi(br.readLine()), cnt = 0;
for(int i = 0; i <= 6; i++) if((n & 1 << i) != 0) cnt++;
print(cnt);
}
static int toi(String s) { return Integer.parseInt(s); }
static String[] getLine() throws IOException { return br.readLine().split(" "); }
static int[] getArr() throws IOException { return Arrays.stream(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); }
static <T> void print(T s) { System.out.print(s); }
static <T> void println(T s) { System.out.println(s); }
}