#include <stdio.h>
#include <stdlib.h>
int main()
{
	int n;
	scanf("%d",&n);
	int i;
	int sum1=0,sum2=0;
	for(i=1;i<=n;i++)
	{
		if(i%2!=0)
			sum1+=i;
		else
			sum2+=i;
	}
	printf("%d %d",sum1,sum2);
	return 0;
}
//Author: ITProgrammer
/**************************************************************
	Problem: 1091
	User: admin
	Language: C
	Result: Accepted
	Time:5 ms
	Memory:1144 kb
****************************************************************/