#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;
#define repeat(i,n)for(int i=0;i<(n);i++)

int main(){

   int N;
   cin>> N;
   int x[N];
   repeat(i, N) cin>> x[i];

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

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

   return 0;
}