#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
	int n;
	cin >> n;
	
	vector<int> arr(n);
	
	for(int i=0; i<n; i++) {
		cin >> arr[i];
	}
	
	int k;
	cin >> k;
	
	sort(arr.begin(), arr.end());
	
	int maxHappiness = 0;

	for(int i=0; i<k; i++) {
		int currentHappiness = arr[i];
		
		if(currentHappiness <= 0) {
			break;
		}
		
		maxHappiness += currentHappiness;
	}
	
	cout << "Maximum Happiness : " << maxHappiness << endl;
	
	return 0;
}