#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
using P = pair<ll,ll>;
constexpr ll mod = 1e9+7;
#define ALL(x) (x).begin(),(x).end()
#define REP(i,n) for(ll (i)=0;(i)<(n);(i)++)
#define REPS(i,n) for(ll (i)=1;(i)<=(n);(i)++)
#define RREP(i,n) for(ll (i)=(n-1);(i)>=0;(i)--)
#define RREPS(i,n) for(ll (i)=(n);(i)>0;(i)--)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
#define UNIQUE(v) v.erase(unique(ALL(v)),v.end());

template<class T> inline void chmin(T& a, T b){
    if (a > b){
        a = b;
    }
}

template<class T> inline void chmax(T& a, T b){
    if (a < b){
        a = b;
    }
}

signed main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout<<fixed<<setprecision(12);
    string N;
    cin >> N;
    if(N.size() == 1){
        if(N[0] == '3' || N[0] == '5' || N[0] == '7' || N[0] == '9' || N[0] == '8'){
            cout << 1 << "\n";
        }else{
            cout << -1 << "\n";
        }
    }else{
        if(N[N.size()-1] == '3' || N[N.size()-1] == '5' || N[N.size()-1] == '7' || N[N.size()-1] == '9' || N[N.size()-1] == '1'){
            cout << 1 << "\n";
        }else if(((N[N.size()-2] - 0)*10 + (N[N.size()-1]  - '0') )% 4 == 0){
            cout << 1 << "\n";
        }else{
            cout << -1 << "\n";
        }
    }
}