#include <iostream>
using namespace std;

int main() {
int i, n, sum_odd=0, sum_even=0;
//cout << "請輸入數字:";
cin >> n;
for (i=1; i<=n; i++){
if (i % 2 == 1)
sum_odd = sum_odd + i;
else
sum_even= sum_even +i;
}
cout << sum_odd << endl;
cout << sum_even << endl;

return 0;
}

sum_odd=0
sum_even=0
n = int(input())

for i in range(1, n+1):
if i % 2 == 1:
sum_odd = sum_odd + i
else:
sum_even = sum_even + i

print(sum_odd)
print(sum_even)