import heapq
import math
class Solution:
def pickGifts(self, gifts: List[int], k: int) -> int:
pq = []
for gift in gifts:
heapq.heappush(pq, (-gift))
for i in range(k):
high = -1 * heapq.heappop(pq)
high = math.floor(math.sqrt(high))
heapq.heappush(pq, (-1 * high))
return -1 * sum(pq)