typedef long long ll;
typedef long double ld;

#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    ll n;
    std::cin >> n;
    if(n<=2){
        return 2;
    }
    unordered_map<ll,ll> kb;
    
    ll k = 2;
    while(k<65){
        ll sum = 0;
        queue<ll> q;
        for (int i = 0; i < k-1; i++) {
            q.push(0);
        }
        q.push(1);
        sum += 1;
        
        while(sum<1e18+10){
            q.push(sum);
            ll t = q.front();
            q.pop();
            sum += sum-t;
            if(kb[sum]==0){
                kb[sum] = k;
            }
        }
        
        k++;
    }
    
    if(kb[n]==0){
        std::cout << -1 << std::endl;
    }else{
        std::cout << kb[n] << std::endl;
    }
}