#include <iostream>
#include <cmath>
#include <queue>
using namespace std;


int main()
{


   int number_of_stone = 0;
   int number_of_bomb  = 0;

   cin>>number_of_stone>>number_of_bomb;

   priority_queue<double> q;
   double weight;
   for(int i=0;i<number_of_stone;i++){
      cin>>weight;
      q.push(weight);
   }

   for(int i=0;i<number_of_bomb;++i){
      double a = q.top(); q.pop();
      a /=2.0;
      if(a>=1.0){
        q.push(a);
        q.push(a);
      }
   }
   cout<<(int)ceil(q.top());
    return 0;
}

最後的(int)沒加會錯 但在codeblocks上運行結果都一樣