#define _USE_MATH_DEFINES #include "bits/stdc++.h" using namespace std; #define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i)) #define rep(i,j) FOR(i,0,j) #define each(x,y) for(auto &(x):(y)) #define mp make_pair #define MT make_tuple #define all(x) (x).begin(),(x).end() #define debug(x) cout<<#x<<": "<<(x)<; using vi = vector; using vll = vector; int f() { string N; cin >> N; if (N == "1")return -1; int n = 0; if (sz(N) < 3)n = stoi(N); else n = stoi(N.substr(sz(N) - 2, 2)); if (n % 4 == 0 || n % 2) { return 1; } return -1; } void solve() { cout << f() << endl; } int main() { ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(15); solve(); return 0; }