from __future__ import print_function
import collections

class sortedlist(collections.Sequence):
    def __init__(self, v):
        self.add(v)

    def add(self, value):
        pass

    def __len__(self):
        pass

    def __getitem__(self, index):
        pass

class sortedset(sortedlist):
    def add(self, value):
        sortedlist.add(self, value)

def leak():
    class T(sortedset):
        pass
    T(1)
    
import sys, gc

for i in range(10):
    leak()
    gc.collect()
    print(len(gc.get_objects()))