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

using namespace std;

int main()
{
    int N;
    cin >> N;
    vector<int> vec(N, 0);
    for(int i = 0; i < N; i++)
        cin >> vec[i];

    sort(vec.begin(), vec.end());

    int sum = 0;

    for(int i = 0; i < N - 1; i++)
    {
        sum += vec[i] / 2;
    }

    cout << vec[N - 1] + sum << endl;

}