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

int main() {
    int n; cin >> n;
    vector<int> x(n);
    for (int &xi: x) cin >> xi;
    sort(x.begin(), x.end());
    int ans = x.back(); x.pop_back();
    for (int xi: x) ans += xi / 2;
    cout << ans << endl;
    return 0;
}