#include
using namespace std;
int main(){
int N;
cin>>N;
float m=2.0,n=1.0;
if(N>0 && m>n && n>0 && m>0){
if(N%2==0){
m=N/2.0;
n=1;
cout<<mm - nn<<" “<<mm + nn ;
}
if(N%2!=0){
m= (N+1)/(2.0);
n= (N-1)/(2.0);
cout<<2mn<<” "<<mm + nn ;
}
}
else{
cout<<"-1"<<endl;
}
return 0;
}