#include <iostream>
#include <vector>
#include <utility>
#include <algorithm>
#include <string>
#include <stack>
using ll = long long;
#define MOD 1000000007
using namespace std;

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