Question 3 (25 points)

In this question, you should implement the following function:

def remove_duplicates(lnk_lst)

排兵布阵

题目背景

小未带领队伍参加了一个比赛，这个比赛需要进行排兵布阵。

题目描述

小未的队伍共有 $n$ 位选手，第 $i$ 位选手的能力值为 $a_i$。对于小未的对手而言，能力值相同的选手是没有区别的。一场比赛由 $m$ 小局构成，每一小局只能派一位选手上场，且一位选手只能参加一小局。

Question 1

Consider the following definition of the left circular-shift operation:
lf seq is the sequence $<a_1, a_2,...a_{n-1}, a_n>$ , the left circular-shift of seq is $<a_2, a_3,…,a_n, a_1>$ ,that is the sequence we get when moving the first entry to the last position, while shifting all other entries to the previous position. For example, the left circular-shift of: $<2, 4, 6, 8, 10>$, is: $<4, 6, 8, 10, 2>$.

Homework 8

Exercise 1: Sieve of Eratosthenes

Early in the course, we saw a few naive ways to output a list of prime numbers. Although we were able to improve the speed of the search a lot by incorporating a few arithmetic insights, it still took longer than it needed to for somewhat larger numbers.

Data analysis

For this lab you'll use dictionaries to collect statistics for a simple data file representing a collection of users. Begin by downloading the starter code and data hereLinks to an external site.

Homework 7

Exercise 1: Luhn's algorithm

Luhn’s algorithm, also known as the modulus 10 or mod 10 algorithm, is a checksum formula used to validate a variety of identification numbers, such as credit card numbers and ID numbers. You will write a program called luhn.py that asks for an account number and determines whether or not the number is valid using Luhn’s algorithm. The steps of the algorithm are given below.

Street craps

In class we looked at a simple card game implemented using object-oriented programming. For this lab, you'll adapt that structure to create a simple dice game based on the classic signifier of misspent youth: street craps.

The rules of street craps are as follows. The shooter rolls two dice. If the first roll is 2, 3, or 12 the shooter loses. If the first roll is 7 or 11, the shooter wins. If the first roll is anything else, that value becomes the shooter's "point". The shooter continues to roll the dice until either the "point" comes up again, in which case the shooter wins, or until a 7 comes up, in which case the shooter loses.

Homework 6

Part 1: Book questions

Create a text file called hw6_book_exercises.txt. Answer 7.7 Exercises 1 through 10 from the textbook.

Part 2: Programming exercises

Programming exercise 1: Triangular number list

This program will revisit the concept of "triangular numbers"Links to an external site. from a previous assignment. You may re-use code from your solution to that assignment if you wish.

For this lab period, please do the following exercise.

Making a rocket

For this exercise, you'll do a little more ascii art! In this exercise, you'll need to pull some of the functionality out of main() into its own functions.

You'll write a program called make_a_rocket.py that prints out a rocket consisting of a nose cone, a fuselage, and a tail fin structure. The program will take 2 required arguments and one optional argument. The two required arguments are numbers representing the width of the rocket in characters, and the length of the rocket's fuselage in square segments. The third argument will be either left blank (not given) or will be the word "striped". The nose cone and tail structure are composed of * characters. The fuselage is made up of X characters by default. If the striped argument is passed when the program is executed, each segment of the fuselage will be drawn half with Xs and half with _ characters, resulting in a striped appearance.