#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005

int main() {
    string n;
    cin >> n;
    if(n == "1" || n == "2" || n == "4" || n == "6"){
        cout << -1 << endl;
        return 0;
    }
    int m = n.size();
    if(m == 1 || n[m-1]=='1'||n[m-1]=='3'||n[m-1]=='5'||n[m-1]=='7'||n[m-1]=='9'){
        cout << 1 << endl;
        return 0;
    }
    int x = (n[m-2]-'0')*10 + (n[m-1]-'0');
    if(x % 4 == 0){
        cout << 1 << endl;
    }else{
        cout << -1 << endl;
    }
    return 0;
}