import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.PriorityQueue;
import java.util.Scanner;

public class Main {
	
	public static long MOD = 1000000007;
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		int[] array = new int[N];
		for(int i = 0; i < N; i++){
			array[i] = -sc.nextInt();
		}
		
		Arrays.sort(array);
		
		for(int i = 0; i < N; i++){
			array[i] = -array[i];
		}
		
		int answer = array[0];
		for(int i = 1; i < N; i++){
			answer += array[i] / 2;
		}
		
		System.out.println(answer);
		
	}
}