#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n;
    cin>>n;
    int s1=0,s2=0;
    for(int i=1;i<=n;i++){
        if(i%2==0) s1+=i;
        else s2+=i;
    }
    cout<<s1<<" "<<s2;
    return 0;
}