//
//  main.cpp
//  Q11
//
//  Created by AkihiroKOBAYASHI on 7/5/15.
//  Copyright (c) 2015 Akhr5884. All rights reserved.
//

#include <iostream>

using namespace std;

string to_binString(unsigned int val){
    if( !val ) {
        return string("0");
    }
    string str;
    while( val != 0 ) {
        if( (val & 1) == 0 )  // val は偶数か？
            str.insert(str.begin(), '0');  //  偶数の場合
        else
            str.insert(str.begin(), '1');  //  奇数の場合
        val >>= 1;
    }
    return str;
}

int canGoValue(string binString) {
    int i;
    int value = 0;
    for(i = 0; i < binString.size(); i++) {
        if(binString[i] == '1') {
            value++;
        }
    }
    return value;
}

int main(int argc, const char * argv[]) {
    using namespace std;
    int goalvalue;
    int *goalvalueArray;
    int i = 0;
    int add;
    int count;
    
    cin >> goalvalue;
    goalvalueArray = (int*)malloc(sizeof(goalvalueArray) * (goalvalue + 1));
    
    while(i <= goalvalue) {
        goalvalueArray[i] = 0;
        i++;
    }
    
    count = 1;
    i = 1;
    goalvalueArray[1] = 1;

    while (1) {
        if(i == goalvalue) {
            cout << count << "\n";
            return 0;
        }
        add = canGoValue(to_binString(i));
        count++;
        if(i + add <= goalvalue){
            i += add;
            goalvalueArray[i] = 1;
        }
        else if(i + add > goalvalue) {
            i -= add;
            if(goalvalueArray[i] == 1) {
                count = -1;
                cout << count << "\n";
                return 0;
            }
            else {
                goalvalueArray[i] = 1;
            }
        }
    }
    
    return 0;
}