4funkcje

import functools
import operator

def pierwsza(lst):
    return (functools.reduce(lambda a,b:a+b,lst))/len(lst)

def druga(lst):
    return functools.reduce(lambda a,b: a if a>b else b,lst)

def trzecia(lst):
    return functools.reduce(operator.concat,lst)

def czwarta(lst_1,lst_2):
    return functools.reduce(lambda x, y: x + y, map(lambda x: abs(x[0]-x[1]), zip(lst_1,lst_2)))

def piata(lst):
    return functools.reduce(lambda x,y: set(x)&set(y),lst)

def main():
    lst1=[1,9]
    lst2=[[1,2],[1,3,6]]
    lst3 = ['Ala','ma','kota']
    lst_1 = [1,2]
    lst_2 = [2,1]
    print(pierwsza(lst1))
    print(druga(lst1))
    print(trzecia(lst2))
    print(czwarta(lst_1,lst_2))
    print(piata(lst3))

if __name__ == '__main__':
    main()