#include<bits/stdc++.h>
using namespace std;
int j,o,n;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		if(i%2==1){
			j+=i;
		}else{
			o+=i;
		}
	}
	cout<<j<<" "<<o;
	return 0;
}
/**************************************************************
	Problem: 1091
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/