Can't pass the test cases

#1

#include
using namespace std;

int main()
{
long long int N;

while(cin>>N)
{
	
	if(N<3)
	{
		cout<<(-1)<<endl;
		continue;
	}
	if(N%2==0)
	{
		cout<<((N*N)/4)-1<<','<<((N*N)/4)+1<<endl;
		break;
	}
	else
	{
		cout<<((N*N)-1)/2<<','<<((N*N)+1)/2<<endl;
		break;
	}
}
return 0;

}

#2

I modified your code a bit. Check it out -

#3

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