#include<stdio.h>

int numOfBits(int n){
	int bits=0;
	do{
		bits += n %2;
		n /= 2;
	}while(n>0);
	
	return bits;
}

int main(){
	int goal;
	scanf("%d",&goal);
	int isPassed[goal+1];
	isPassed[0]=1;
	int q[100000];
	q[0]=1;
	q[1]=-1;
	int q_head=0,q_tail=1;
	int position;
	int back,forward;
	int depth = 1;
	
	do{
		if(q[q_head]==-1){
			depth++;
			q_head++;
			q[q_tail+1]=-1;
			q_tail++;
			continue;
		}
		
		position = q[q_head];
		q_head++;
		
		back = position - numOfBits(position);
		forward = position + numOfBits(position);
		isPassed[position]=1;
		
		//printf("position:%2d depth:%2d\n",position,depth);
		//printf("back:%2d forward:%2d\n\n",back,forward);
		
		if(back==goal || forward==goal){
			printf("%d\n",depth+1);
			break;
		}
		
		if(back>0 && back <=goal && isPassed[back]!=1){
			q[q_tail+1]=back;
			q_tail++;
		}
		
		if(forward>0 && forward <=goal && isPassed[forward]!=1){
			q[q_tail+1]=forward;
			q_tail++;
		}
		
		if(q_head == q_tail){
			break;
		}

			
	}while(1);
	
	//printf("%d\n",numOfBits(n));
	//printf("%d %d",isPassed[0],isPassed[n]);
	
	printf("-1\n");
	
	return 0;
}