#include <iostream>
#include <string.h>
#include <vector>
using namespace std;
int N;
int get1Nums(int n)
{
	char S[100];
	memset(S,'\0',100);
	sprintf(S,"%x",n);
	int num=0;
	char *p=S;
	while (*p!='\0'){
		switch(*p){
			case '1'://0001
			case '2'://0010
			case '4'://0100
			case '8'://1000
				num+=1;
				break;
			case '3'://0011
			case '5'://0101
			case '6'://0110
			case '9'://1001
			case 'a'://1010
			case 'c'://1100
				num+=2;
				break;
			case '7'://0111
			case 'b'://1011
			case 'd'://1101
			case 'e'://1110
				num+=3;
				break;
			case 'f':
				num+=4;
				break;
		}
		p++;
	}
	return num;
}
int GetMinCost(int n,vector<int> &A,vector<bool> &visited,vector<int> &cost)
{
	if (cost[N]!=0){
		return cost[N];
	}

	bool left=false;
	bool right=false;
	visited[n]=true;
	int nRight=n+A[n];
	if (nRight<=N){
		if (!visited[nRight]){
			visited[nRight]=true;
			cost[nRight]=cost[n]+1;
			GetMinCost(nRight,A,visited,cost);
			right=true;
		}
	}	
	int nLeft=n-A[n];
	if (nLeft>0){
		if (!visited[nLeft]){
			visited[nLeft]=true;
			cost[nLeft]=cost[n]+1;
			GetMinCost(nLeft,A,visited,cost);
			left=true;
		}
	}
	
	if (!left && !right){
		return -1;
	}

}
int main(int argc, char* argv[])
{

	cin>>N;
	vector<int> A(N+1);
	vector<bool> visited(N+1);
	vector<int> cost(N+1,0);

	for (int i=1;i<=N;i++){
		A[i]=get1Nums(i);
	}
	visited[1]=true;
	cost[1]=1;
	GetMinCost(1,A,visited,cost);
	if (cost[N]!=0){
		cout<<cost[N]<<endl;
	}else{
		cout<<-1<<endl;
	}
	return 0;
}