#include<bits/stdc++.h>

using namespace std;

int main()

{

int n,x=0,y=0;

cin>>n;

for(int i=0;i<=n;i++)

{

if(i%2==0)

{

x=x+i;

}

if(i%2!=0)

{

y=y+i;

}

}

cout<<y<<" "<<x;

return 0;

}