#include <iostream>
#include <string.h>
#include <vector>
using namespace std;
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 main(int argc, char* argv[])
{
	int N;
	cin>>N;
	vector<int> A(N+1);
	vector<int> flag(N+1);
	for (int i=1;i<=N;i++){
		A[i]=get1Nums(i);
	}

	int index=A[1];
	if (index==N){
		cout<<0<<endl;
		return 0;
	}
	flag[1]=true;
	int ans=1;
	while(true){
		if (index==N){
			cout<<ans<<endl;
			return 0;
		}
		if (index+A[index]<=N){
			index+=A[index];
		}else{
			index-=A[index];
		}
		ans++;
		flag[index]++;
		if (flag[index]==2){
			cout<<-1<<endl;
			return 0;
		}
	}
	
	return 0;
}