#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include <random>
#include<map>
#include <iomanip>
#include <time.h>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
#include<fstream>
using namespace std;
#define eps 0.000000001
#define LONG_INF 10000000000000000
#define GOLD 1.61803398874989484820458
#define MAX_MOD 1000000007
#define f(n) for(int i=0;i<n;++i)
#define REP(i,n) for(long long i = 0;i < n;++i)
int main() {
#define int long long
	long long ans = 0;
	int n;
	cin >> n;
	vector<int> a;
	REP(i, n) {
		int now;
		cin >> now;
		a.push_back(now);
	}
	sort(a.begin(), a.end());
	for (int i = n - 2;i >= 0;--i) {
		ans += a[i] / 2;
	}
	ans += a[n - 1];
	cout << ans << endl;
	return 0;
}