import java.io.*; import java.util.*; import java.util.function.Function; public class Main { static int N; public static void main(String[] args) { FastScanner sc = new FastScanner(System.in); N = sc.nextInt(); System.out.println(solve()); } static int solve() { int[] dist = new int[N+1]; Arrays.fill(dist, Integer.MAX_VALUE); dist[1] = 0; ArrayDeque q = new ArrayDeque<>(); q.add(1); while( !q.isEmpty() ) { int a = q.poll(); int cnt = Integer.bitCount(a); if( a + cnt <= N && dist[a+cnt] > dist[a] + 1) { dist[a+cnt] = dist[a]+1; q.add(a+cnt); } if( a - cnt >= 1 && dist[a-cnt] > dist[a] + 1) { dist[a-cnt] = dist[a]+1; q.add(a-cnt); } } if( dist[N] == Integer.MAX_VALUE ) { return -1; } else { return dist[N] + 1; } } @SuppressWarnings("unused") static class FastScanner { private BufferedReader reader; private StringTokenizer tokenizer; FastScanner(InputStream in) { reader = new BufferedReader(new InputStreamReader(in)); tokenizer = null; } String next() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new StringTokenizer(reader.readLine()); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } String nextLine() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { return reader.readLine(); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken("\n"); } long nextLong() { return Long.parseLong(next()); } int nextInt() { return Integer.parseInt(next()); } int[] nextIntArray(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt(); return a; } int[] nextIntArray(int n, int delta) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt() + delta; return a; } long[] nextLongArray(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nextLong(); return a; } } static void writeLines(A[] as, Function f) { PrintWriter pw = new PrintWriter(System.out); for (A a : as) pw.println(f.apply(a)); pw.flush(); } static void writeLines(int[] as) { PrintWriter pw = new PrintWriter(System.out); for (int a : as) pw.println(a); pw.flush(); } static void writeLines(long[] as) { PrintWriter pw = new PrintWriter(System.out); for (long a : as) pw.println(a); pw.flush(); } static void writeSingleLine(int[] as) { PrintWriter pw = new PrintWriter(System.out); for (int i = 0; i < as.length; i++) { if (i != 0) pw.print(" "); pw.print(i); } pw.println(); pw.flush(); } static int max(int... as) { int max = Integer.MIN_VALUE; for (int a : as) max = Math.max(a, max); return max; } static int min(int... as) { int min = Integer.MAX_VALUE; for (int a : as) min = Math.min(a, min); return min; } static int lowerBound(int[] array, int value) { int low = 0; int high = array.length; int mid; while (low < high) { mid = ((high - low) >>> 1) + low; if (array[mid] < value) low = mid + 1; else high = mid; } return low; } static int upperBound(long[] array, long value) { int low = 0; int high = array.length; int mid; while (low < high) { mid = ((high - low) >>> 1) + low; if (array[mid] <= value) low = mid + 1; else high = mid; } return low; } static void debug(Object... args) { StringJoiner j = new StringJoiner(" "); for (Object arg : args) { if (arg instanceof int[]) j.add(Arrays.toString((int[]) arg)); else if (arg instanceof long[]) j.add(Arrays.toString((long[]) arg)); else if (arg instanceof double[]) j.add(Arrays.toString((double[]) arg)); else if (arg instanceof Object[]) j.add(Arrays.toString((Object[]) arg)); else j.add(arg.toString()); } System.err.println(j.toString()); } }