#include <bits/stdc++.h>
using namespace std;
int main(void){

    int n;
    cin >> n;
    vector<bool> onCell(n);
    for(int i=0; i<n; i++) onCell[n] = false;
    
    int result = 1;
    int point = 1;
    while(1) {
 //       cout << point << endl;
        onCell[point] = true;
        int bits = 0;
        for(int j=0; j<32; j++) {
            if((0x01 & (point>>j)) == 0x01) {
                bits++;
            }
        }
        if(point + bits < n && !onCell[point+bits]) {
            point += bits;
            result++;
        }
        else if(point + bits == n) {
            result++;
            cout << result << endl;
            return 0;
        }
        else if(point + bits > n && !onCell[point+bits]) {
            point -= bits;
            result++;
        }
        else {
            break;
        }
    }
    
    cout << "-1" << endl;

    return 0;
    
}