#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;
}

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