#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000
#define MOD 998244353
using ll=long long;
using Graph=vector<vector<int>>;

int main(){
  string S;
  cin>>S;
  int N=S.size();
  int x;
  if(N==1){
    x=S[0]-'0';
  }else{
    x=10*(S[N-2]-'0')+(S[N-1]-'0');
  }
  x%=4;
  if(x==2){
    cout<<-1<<endl;
  }else{
    cout<<1<<endl;
  }

}