#include<bits/stdc++.h>
using namespace std;
int main() {
int n;
cin>>n;
int a,b;
if(n==1 || n==2)
{
cout<<"-1"<<endl;
}
else if(n%2==0)
{
a=n*n/4-1;
b=n*n/4+1;
cout<<a<<" "<<b<<endl;
}
else if(n%2!=0)
{
a=(n*n-1)/2;
b=(n*n+1)/2;
cout<<a<<" "<<b<<endl;
}
return 0;
}