#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>

using namespace std;

int main(){
    queue<pair<int,int>> q;
    int n,now,mo,bit,k;
    bool sude[10001]={};
    
    scanf("%d",&n);
    
    q.push(make_pair(1,1));
    sude[1]=true;
    
    for(;!q.empty();){
        now = bit =q.front().first;
        k = q.front().second;
        q.pop();
        
        if(now==n){
            printf("%d\n",k);
            return 0;
        }
        
        mo=0;
        while(bit>0){
            mo+=bit%2;
            bit/=2;
        }
        
        if(mo<now)
            if(!sude[now-mo]){
                q.push(make_pair(now-mo,k+1));
                sude[now-mo]=true;
            }
        if(mo+now<=n)
            if(!sude[now+mo]){
                q.push(make_pair(now+mo,k+1));
                sude[now+mo]=true;
            }
    }
    
    printf("-1\n");
    return 0;
}