#include <iostream> using namespace std; int main() { int N; cin >> N; long long odd_sum = 0, even_sum = 0; for (int i = 1; i <= N; i++) { if (i % 2 == 1) { odd_sum += i; } else { even_sum += i; } } cout << odd_sum << " " << even_sum << endl; return 0; }