#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < n; ++i)
using ll = long long;
const int INF=1e9;
int dp[10001];
int N;
void f(int x=2,int y=2){
   if(x<=0||x>N||dp[x]<=y)return;
   dp[x]=y;
   int z=__builtin_popcount(x);
   f(x-z,y+1);
   f(x+z,y+1);
}
int main() {
   cin>>N;
   rep(i,10001)dp[i]=INF;
   dp[1]=1;
   f();
   cout<<(dp[N]==INF?-1:dp[N])<<endl;
}