using System;
using System.Linq;
using System.Collections.Generic;

static class Program{
    static void Main(){
        new Magatro().Solve();
    }
}

class Magatro{
    private int N;
    private int[]A;
    public void Solve(){
        N = int.Parse(Console.ReadLine());
        A = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        Array.Sort(A);
        int anser = A[N-1];
        for(int i =0;i<N-1;i++){
            anser+=A[i]/2;
        }
        Console.WriteLine(anser);
    }
}