#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<boost/multiprecision/cpp_int.hpp>
using namespace std;
namespace mp = boost::multiprecision;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;

int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
mp::cpp_int x;
cin >> x;
if(x % 4 == 0 || x % 2 != 0 || x == 1){
    cout << 1 << endl;
}else{
    cout << -1 << endl;
}
}