# -*- coding:utf-8 -*-
# @Description
# @Author: Shimin
# @Copyright
# @Version:0.0.1
find = [1,5,7,3,8,2]


dct = {'a': [1, 2, 3], 'b': [1, 2, 3, 4], 'c': [1, 2, 3, 4, 5], 'd':[1,2], 'e':[1]}

print(max(find))
print(len(dct.keys()))
dct.pop('a')
print(dct)