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

int main() {
    int n;
    cin >> n;
    vector<int> x(n,0);
    for(int i = 0;i < n;i++){
        cin >> x[i];
    }
    sort(x.begin(),x.end(),greater<int>());
    int ans = 0;
    ans += x[0];
    for(int i = 1;i < n;i++){
        ans += x[i]/2;
    }
    cout << ans << endl;
    return 0;
}