#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
constexpr int Inf = 2000000010;
constexpr ll INF= 2000000000000000000;
constexpr ll MOD = 1000000007;
const double PI = 3.1415926535897;
typedef pair<int,int> P;
typedef pair<int,P> PP;

template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}

template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}

ll mod(ll val, ll M) {
    ll res = val % M;
    if(res < 0) {
        res += M;
    }
    return res;
}

template<typename T>
T RS(T N, T P, T M){
    if(P == 0) {
        return 1;
    }
    if(P < 0) {
        return 0;
    }
    if(P % 2 == 0){
        ll t = RS(N, P/2, M);
        if(M == -1) return t * t;
        return t * t % M;
    }
    if(M == -1) {
        return N * RS(N,P - 1,M);
    }
    return N * RS(N, P-1, M) % M;
}

int main() {
    string S;
    cin >> S;
    reverse(S.begin(),S.end());
    ll cnt = 0;
    for(ll i = 0;i < S.size();i++) {
        cnt += (ll)(S.at(i) - '0') * RS(10ll,i,4ll);
        cnt %= 4;
    }
    if(S == "1" || S == "4") {
        cout << -1 << endl;
    }
    else if(cnt == 2) {
        cout << -1 << endl;
    }
    else {
        cout << 1 << endl;
    }
}