from 练习题 import *


if __name__ == '__main__':
    # Exercises.exer1()
    # Exercises.exer2()
    # Exercises.exer3()
    # Exercises.exer4()
    # Exercises.exer5()
    # Exercises.exer6()
    # Exercises.exer7()
    # Exercises.exer8()
    # Exercises.exer9()
    # print(Exercises.exer10())
    print(Exercises.exer11())