#include using namespace std; int main(int argc, const char * argv[]) { int N; cin >> N; int top = 0; int bottom = 0; for(int i = 1; i <= N/2; i++) { top = i; bottom = N - i; double res1 = log2(top) - (int)(log2(top)); double res2 = log2(bottom) - (int)(log2(bottom)); if (res1 != 0 && res2 != 0) { cout << top << " " << bottom << endl; return 0; } } cout << "-1" << endl; return 0; }