[실4] 2217 - 로프

int input[100001];
int n, ans;

int main() 
{
	cin >> n;

	for (int i = 0; i < n; i++)
		cin >> input[i];

	sort(input, input + n);

	for (int i = 0; i < n; i++)
		ans = max(ans, (n - i) * input[i]);

	cout << ans;
}