2023/3/21

#define  _CRT_SECURE_NO_WARNINGS
#include  "bits/stdc++.h"

using namespace std;
typedef long long ll;
int main()
{
	ll a, b;
	cin >> a >> b;
	ll cnt = a / b;
	ll cha = a%b;
	if (cnt > cha) {
		cout << "niuniu eats less than others" << endl;
	}
	else if (cnt == cha) {
		puts("same");
	}
	else {
		cout << "niuniu eats more than others" << endl;
	}
	return 0;
}

#define  _CRT_SECURE_NO_WARNINGS
#include  "bits/stdc++.h"

using namespace std;
typedef long long ll;
const int N = 1e6 + 50;
ll a[N];
int main()
{
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	sort(a + 1, a + 1 + n);
	ll sum = 0;

	/// 每两个玩具免单一个
	if (n % 2 == 0) {
		for (int i = 2; i <= n; i += 2) {
			sum += a[i];
		}
	}
	else {
		for (int i = 1; i <= n; i += 2) {
			sum += a[i];
		}
	}
	
	cout << sum ;

	return 0;
}