#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

int main()
{
	int N; cin >> N;

	vector<int>x(N);
	for (int i = 0; i < N; i++) {
		cin >> x[i];
	}

	sort(x.begin(), x.end());
	reverse(x.begin(), x.end());


	int ans = x[0];
	for (int i = 1; i < N; i++) {
		ans += x[i] / 2;
	}

	cout << ans << endl;

    return 0;
}