#include <iostream>
#include <string>
#include <cmath>
#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <utility>
#include <functional>

using namespace std;

int main() {
	int n, a[100000];

	cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
	}

	sort(a, a + n, greater<int>());
	int ans = a[0];
	for (int i = 1; i < n; ++i) {
		ans += a[i] / 2;
	}
	cout << ans << endl;

	return 0;
}