Buggy python submission (verdict: Time Limit Exceeded):
import sys
sys.setrecursionlimit(10 ** 7)
input = sys.stdin.buffer.readline
class SkewHeap:
  def __init__(self, init_val = None, left = None, right = None):
    self.val = init_val
    self.left = left
    self.right = right
    self.root = None
  def heapmeld(self, h1, h2):
    if h1 == None: return h2
    if h2 == None: return h1
    if h1.val > h2.val:
      h1.val, h1.left, h1.right, h2.val, h2.left, h2.right = h2.val, h2.left, h2.right, h1.val, h1.left, h1.right
    h1.right = self.heapmeld(h2, h1.right)
    return h1
  def heappop(self):
    if self.root == None:
      res = self.val
      h = self.heapmeld(self.left, self.right)
      if h == None: h = SkewHeap(None)
      self.val, self.left, self.right = h.val, h.left, h.right
      return res
    res = self.root.val
    self.root = self.heapmeld(self.root.left, self.root.right)
    return res
  def heappush(self, x):
    h = SkewHeap(x)
    self.root = self.heapmeld(self.root, h)
N, M = map(int, input().split())
a = list(map(int, input().split()))
h = SkewHeap()
res = 0
for e in a:
  h.heappush(-e)
for _ in range(M):
  h.heappush(-(-h.heappop() // 2))
for _ in range(N):
  res -= h.heappop()
print(res)

Fixed submission:
import heapq
N, M = map(int, input().split())
A = list(map(int, input().split()))
A = [-a for a in A]
heapq.heapify(A)
for _ in range(M):
  p = heapq.heappop(A)
  p = -p
  p //= 2
  p = -p
  heapq.heappush(A, p)
print(-sum(A))

Buggy python submission (verdict: Time Limit Exceeded):
import sys
sys.setrecursionlimit(10 ** 7)
input = sys.stdin.buffer.readline
class SkewHeap:
  def __init__(self, init_val = None, left = None, right = None):
    self.val = init_val
    self.left = left
    self.right = right
    self.root = None
  def heapmeld(self, h1, h2):
    if h1 == None: return h2
    if h2 == None: return h1
    if h1.val > h2.val:
      h1.val, h1.left, h1.right, h2.val, h2.left, h2.right = h2.val, h2.left, h2.right, h1.val, h1.left, h1.right
    h1.right = self.heapmeld(h2, h1.right)
    return h1
  def heappop(self):
    if self.root == None:
      res = self.val
      h = self.heapmeld(self.left, self.right)
      if h == None: h = SkewHeap(None)
      self.val, self.left, self.right = h.val, h.left, h.right
      return res
    res = self.root.val
    self.root = self.heapmeld(self.root.left, self.root.right)
    return res
  def heappush(self, x):
    h = SkewHeap(x)
    self.root = self.heapmeld(self.root, h)
N, M = map(int, input().split())
a = list(map(int, input().split()))
h = SkewHeap()
res = 0
for e in a:
  h.heappush(-e)
for _ in range(M):
  h.heappush(-(-h.heappop() // 2))
for _ in range(N):
  res -= h.heappop()
print(res)

Fixed submission:
import heapq
N, M = map(int, input().split())
A = list(map(int, input().split()))
A = [-a for a in A]
heapq.heapify(A)
for _ in range(M):
  p = heapq.heappop(A)
  p = -p
  p //= 2
  p = -p
  heapq.heappush(A, p)
print(-sum(A))

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.buffer.readline
class SkewHeap:
  def __init__(self, init_val = None, left = None, right = None):
    self.val = init_val
    self.left = left
    self.right = right
    self.root = None
  def heapmeld(self, h1, h2):
    if h1 == None: return h2
    if h2 == None: return h1
    if h1.val > h2.val:
      h1.val, h1.left, h1.right, h2.val, h2.left, h2.right = h2.val, h2.left, h2.right, h1.val, h1.left, h1.right
    h1.right = self.heapmeld(h2, h1.right)
    return h1
  def heappop(self):
    if self.root == None:
      res = self.val
      h = self.heapmeld(self.left, self.right)
      if h == None: h = SkewHeap(None)
      self.val, self.left, self.right = h.val, h.left, h.right
      return res
    res = self.root.val
    self.root = self.heapmeld(self.root.left, self.root.right)
    return res
  def heappush(self, x):
    h = SkewHeap(x)
    self.root = self.heapmeld(self.root, h)
N, M = map(int, input().split())
a = list(map(int, input().split()))
h = SkewHeap()
res = 0
for e in a:
  h.heappush(-e)
for _ in range(M):
  h.heappush(-(-h.heappop() // 2))
for _ in range(N):
  res -= h.heappop()
print(res)

Fixed submission:
import heapq
N, M = map(int, input().split())
A = list(map(int, input().split()))
A = [-a for a in A]
heapq.heapify(A)
for _ in range(M):
  p = heapq.heappop(A)
  p = -p
  p //= 2
  p = -p
  heapq.heappush(A, p)
print(-sum(A))