#include <stdio.h>

int bit_count(int);

int main(void){
    
int N;
int location=1; //現在のマスの位置
int bit=0;      // 何ビット進むかor戻るか
int sum;		
int times=1;    //移動回数

scanf("%d",&N);

while(location != N){

bit = bit_count(location);
sum = location + bit;

if(sum <= N) 
location += bit;

else
location -= bit;

times++;
sum=0;

if(times >= 10000){
printf("-1");
break;
}

}

if(times < 10000)
printf("%d",times);

return 0;   
    
}


int bit_count(int n)
{
int bit_counter=0;

    while(n>=1)
    {

    if(n%2==1)
    bit_counter++;

    n=n/2;
    }

return bit_counter;

}