#include <bits/stdc++.h>
using namespace std;
int main(){
int n,j=0,o=0;
cin>>n;
for(int i=1;i<=n;i++){
	if(i%2!=0){
	j+=i;	
	}else o+=i;
}	
cout<<j<<" "<<o;
	return 0;
	}

/**************************************************************
	Problem: 1091
	User: mc002
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/