import java.io.FileNotFoundException;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws FileNotFoundException {
		long t = System.currentTimeMillis();
		new Main().run();
		System.err.println(System.currentTimeMillis() - t);
	}
	
	Scanner sc = new Scanner(System.in);
	
	void run() {
		int N=sc.nextInt();
		int[] x=new int[N];
		for(int i=0;i<N;++i)x[i]=sc.nextInt();
		Arrays.sort(x);
		long cur=x[N-1];
		for(int i=0;i<N-1;++i) {
			cur+=x[i]/2;
		}
		System.out.println(cur);
	}


	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}