class Heap:

    # 初期化
    def __init__(self):
        self.array = []

    def num(self):
        return len(self.array)
        
    # valを追加する
    def put(self, val):
        pos = len(self.array)
        # valを末尾に追加する
        self.array.append(val)
        # valを適当な位置まで上にあげる
        self.pop_up(pos)
        
    # 最大の要素を取り出す
    def get(self):
        assert len(self.array) > 0

        val = self.array[0]
        
        # 末尾の要素を0に移動してから下に下げる
        t_val = self.array[-1]
        self.array[0] = t_val
        del self.array[-1]
        self.push_down(0)
        return val

    # posの位置の要素を適当な位置まで上げる
    def pop_up(self, pos):
        while pos > 0:
            p_pos = (pos - 1) // 2
            val = self.array[pos]
            p_val = self.array[p_pos]
        
            if val > p_val:
                self.array[pos] = p_val
                self.array[p_pos] = val
                pos = p_pos
            else:
                break
            
    def push_down(self, pos):
        while True:
            l_pos = 2 * pos + 1
            r_pos = 2 * pos + 2
            n = len(self.array)
            
            if n <= l_pos:
                # 子がいない場合
                break
            
            elif n == r_pos:
                # 子が一人の場合
                val = self.array[pos]
                l_val = self.array[l_pos]
                
                if val < l_val:
                    self.array[pos] = l_val
                    self.array[l_pos] = val
                    
                break #
            
            else:
                # 子が二人いるとき
                val = self.array[pos]
                l_val = self.array[l_pos]
                r_val = self.array[r_pos]
                
                if l_val > r_val:
                    if val < l_val:
                        self.array[pos] = l_val
                        self.array[l_pos] = val
                        pos = l_pos
                    else:
                        break
                else:
                    if val < r_val:
                        self.array[pos] = r_val
                        self.array[r_pos] = val
                        pos = r_pos
                    else:
                        break

                        
h = heap()
sn,sm = input().split(" ")
n = int(sn)
m = int(sm)
sa_list = input().split(" ")
l = len(sa)

for sa in sa_list:
  a = int(sa)  
  h.put(a)
 
for i in range(m):  
    max_a = h.get()
    h.put(max_a // 2)

    

print(sum(h.array))


### FIXED CODE ###

class Heap:

    # 初期化
    def __init__(self):
        self.array = []

    def num(self):
        return len(self.array)
        
    # valを追加する
    def put(self, val):
        pos = len(self.array)
        # valを末尾に追加する
        self.array.append(val)
        # valを適当な位置まで上にあげる
        self.pop_up(pos)
        
    # 最大の要素を取り出す
    def get(self):
        assert len(self.array) > 0

        val = self.array[0]
        
        # 末尾の要素を0に移動してから下に下げる
        t_val = self.array[-1]
        self.array[0] = t_val
        del self.array[-1]
        self.push_down(0)
        return val

    # posの位置の要素を適当な位置まで上げる
    def pop_up(self, pos):
        while pos > 0:
            p_pos = (pos - 1) // 2
            val = self.array[pos]
            p_val = self.array[p_pos]
        
            if val > p_val:
                self.array[pos] = p_val
                self.array[p_pos] = val
                pos = p_pos
            else:
                break
            
    def push_down(self, pos):
        while True:
            l_pos = 2 * pos + 1
            r_pos = 2 * pos + 2
            n = len(self.array)
            
            if n <= l_pos:
                # 子がいない場合
                break
            
            elif n == r_pos:
                # 子が一人の場合
                val = self.array[pos]
                l_val = self.array[l_pos]
                
                if val < l_val:
                    self.array[pos] = l_val
                    self.array[l_pos] = val
                    
                break #
            
            else:
                # 子が二人いるとき
                val = self.array[pos]
                l_val = self.array[l_pos]
                r_val = self.array[r_pos]
                
                if l_val > r_val:
                    if val < l_val:
                        self.array[pos] = l_val
                        self.array[l_pos] = val
                        pos = l_pos
                    else:
                        break
                else:
                    if val < r_val:
                        self.array[pos] = r_val
                        self.array[r_pos] = val
                        pos = r_pos
                    else:
                        break

                        
h = Heap()
sn,sm = input().split(" ")
n = int(sn)
m = int(sm)
sa_list = input().split(" ")


for sa in sa_list:
  a = int(sa)  
  h.put(a)
 
for i in range(m):  
    max_a = h.get()
    h.put(max_a // 2)

    

print(sum(h.array))