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classMinHeap:def__init__(self):self.heap=[]defadd(self,v):self.heap.append(v)self.__sift_up__(len(self.heap)-1)defdelete(self,v):h=self.heapifh:try:idx=self.heap.index(v)h[idx],h[-1]=h[-1],h[idx]h.pop()ifidx<len(h):self.__sift_down__(idx)self.__sift_up__(idx)exceptValueError:...defprint_min(self):ifself.heap:print(self.heap[0])def__sift_up__(self,idx):# compare and swap with parent upwards repeatedly: (idx-1)//2h=self.heapitem=h[idx]whileidx>0:parent_idx=(idx-1)//2ifitem<h[parent_idx]:h[idx]=h[parent_idx]idx=parent_idxelse:breakh[idx]=itemdef__sift_down__(self,idx):# compare and swap with children downwards repeatedly:h=self.heapsize=len(h)item=h[idx]whileTrue:l_idx,r_idx,min_idx=2*idx+1,2*idx+2,idxifl_idx<sizeandh[l_idx]<item:min_idx=l_idxifr_idx<sizeandh[r_idx]<h[min_idx]:min_idx=r_idxifmin_idx!=idx:h[idx]=h[min_idx]idx=min_idxelse:breakh[idx]=item# Initialize the min-heapminHeap=MinHeap()# Number of operationsnum_of_queries=int(input())# Execute operationsfor_inrange(num_of_queries):op=input().split()op_code=op[0]ifop_code=='1':minHeap.add(int(op[1]))elifop_code=='2':minHeap.delete(int(op[1]))elifop_code=='3':minHeap.print_min()
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