#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
//#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;

int N;
int x[101010];

signed main()
{
    cin >> N;
    REP(i,N) {
        cin >> x[i];
    }

    sort(x, x + N);

    REP(i,N-1) {
        x[N-1] += x[i] / 2;
    }

    cout << x[N-1] << endl;
}