#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
#define dunk(a) cout << (a) << endl
using namespace std;
typedef long long ll;

signed int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	vector<int> x(n);
	rep(i, n) cin >> x[i];
	sort(all(x));
	int ans = x[n - 1];
	rep(i, n - 1) {
		ans += floor(x[i] / 2);
	}
	dunk(ans);
	return 0;
}