from collections import var = defaultdict(int)
#n 길이의 list 선언 list = [0] * n
from heapq import * hq=[] heapify(hq) heappush(hq,3) heappush(hq,2) heappush(hq,1) print(hq) #[1, 3, 2] heappop(hq) print(hq) #[2, 3]