#include<algorithm>

#include<cmath>

#include<cstdio>

#include<iostream>

using namespace std;

int main(){

int n,oddSum=0,evenSum=0;

cin>>n;

for(int i=1;i<=n;i++){

if(i&1){

oddSum+=i;

}

else{

evenSum+=i;

}

}

printf("%d %d",evenSum,oddSum);

return 0;

}