import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[] dp = new int[n + 1];
        ArrayDeque<Path> deq = new ArrayDeque<>();
        deq.add(new Path(1, 1));
        Arrays.fill(dp, Integer.MAX_VALUE);
        while (deq.size() > 0) {
            Path p = deq.poll();
            if (dp[p.idx] <= p.value) {
                continue;
            }
            dp[p.idx] = p.value;
            int pop = getPop(p.idx);
            if (p.idx + pop <= n) {
                deq.add(new Path(p.idx + pop, p.value + 1));
            }
            if (p.idx - pop >= 1) {
                deq.add(new Path(p.idx - pop, p.value + 1));
            }
        }
        System.out.println(dp[n] == Integer.MAX_VALUE ? -1 : dp[n]);
    }
    
    static class Path {
        int idx;
        int value;
        
        public Path(int idx, int value) {
            this.idx = idx;
            this.value = value;
        }
    }
    
    static int getPop(int x) {
        int pop = 0;
        while (x > 0) {
            pop += x % 2;
            x >>= 1;
        }
        return pop;
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}