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

typedef long long ll;
using namespace std;

#define mod 1000000009
#define INF 10000000
#define LLINF 2000000000000000000LL

#define SIZE 10001

int bit_count(ll n){
    int ret = 0;
    
    while(n){
        if(n%2)
            ret++;
        n/=2;
    }
    
    return ret;
}

int main(){
    ll n,now=1;
    int ans=0;
    
    scanf("%lld",&n);
    
    while(1){
        now+=bit_count(now);
        ans++;
        
        if(n==now){
            printf("%d\n",ans);
        }
        
        if(ans>=INF) break;
    }
    
    puts("-1");
    
    return 0;
}