#include <iostream>
#include <algorithm>
using namespace std;
const int N = 10010;
int a[N];
int n;
int main()
{
    scanf("%d", &n);
    for (int i = 0; i < n; i++) scanf("%d", &a[i]);

    sort(a, a + n);
    int res = a[0];
    for (int i = 1; i < n; i++)
    {
        res = res + a[i] >> 1;
    }

    printf("%d", res);
    return 0;
}