#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,b=0,c=0,i;
    cin>>a;
    for(i=1;i<=a;i++){
        if(i%2==0)
        b+=i;
        else c+=i;
    }cout<<c<<" "<<b;
     
    }
/**************************************************************
	Problem: 1091
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/