#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: zhuangwenya
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/