Jan 2024 Update: Problem 3 - AB Equality Create a recursive function in a file called ab_equality.py: def ab equalín, k, current) Print

Question

Problem 3 - AB Equality Create a recursive function in a file called ab_equality.py: def ab equalín, k, current) Print out all of the strings of a's and b's of length n so that the number of a's and b's are equal. For n = 2, there's ab and ba. For n = 3 there are no strings since they'd have to have 2 a's and lb, or 2 b's a la so not equal. For n = 4, there will be 6 of these strings, and for n = 5, zero again. Hint: use k to track the difference between a's and b's. So for instance if your current is aaabb then k should be equal to either 1 or -1 (your choice depending). When you call the function, you should call it from your main or testing function with the length in the n parameter, O should be put into the k parameter, and then an empty string will be passed in for current. What length do you want to run? 4 aabb abab abba baab baba bbaa linux5[110] % python3 ab_equality.py What length do you want to run? 6 aaabbb aababb aabbab aabbba abaabb ababab ababba abbaab abbaba abbbaa baaabb baabab baabba babaab bababa babbaa bbaaab bbaaba bbabaa bbbaaa

Asked By GoldenSunset48 at 19 Jan 2024

Answered By Expert

Jackson

Expert · 5.4k answers · 5k people helped

Step 1/2

Here is the python programming for the discribed problem..

Explanation:

Python code for the `ab_equal` function:

Explanation:

1. `ab_equal` Function:

Explanation:

- The `ab_equal` function is a recursive function that generates and prints strings of 'a's and 'b's of length `n` such that the number of 'a's and 'b's are equal.

Explanation:

- It takes three parameters:

Explanation:

- `n`: The remaining length of the string to generate.

Explanation:

- `k`: A variable that tracks the difference between the number of 'a's and 'b's in the string.

Explanation:

- `current`: The current string being built.

Explanation:

2. Base Case:

Explanation:

- The base case of the recursion is defined as follows:

Explanation:

- If `n` is 0 (indicating that the desired length of the string is achieved) and `k` is 0 (indicating that the number of 'a's and 'b's in the current string is equal), it prints the current string and returns.

Explanation:

- This base case is reached when a valid string with an equal number of 'a's and 'b's is constructed.

Explanation:

3. Recursive Cases:

Explanation:

- If the base case is not met, the function proceeds with recursive cases:

Explanation:

- If `n` is greater than 0, it adds an 'a' to the current string, decrements both `n` and `k` by 1 (to maintain the length and balance), and makes a recursive call with the updated parameters.

Explanation:

- If `n` is still greater than 0, it adds a 'b' to the current string, decrements `n` by 1 (to maintain the length), and increments `k` by 1 (to balance the number of 'a's and 'b's), then makes another recursive call with the updated parameters.

Explanation:

- These two cases ensure that the function explores all possible combinations of 'a's and 'b's.

Explanation:

4. Main Function:

Explanation:

- The code block with `if name == "__main__":` is the main or testing function.

Explanation:

- It prompts the user to input the desired length of the strings and calls the `ab_equal` function with the initial values of `n`, `k`, and an empty string `current`.

Explanation:

When you run this script and input the desired length, the `ab_equal` function will generate and print all strings of 'a's and 'b's with an equal number of each, following the pattern of balancing 'a's and 'b's as described in the recursive cases. The base case ensures that only valid strings are printed.

Step 2/2

With this corrected code, when you input the desired length (e.g., 4 or 6), it will generate and print all strings of 'a's and 'b's with an equal number of each, following the pattern you specified.

Final Answer

Output of the program

What length do you want to run? 6

aaabbb

aababb

aabbab

aabbba

abaabb

ababab

ababba

abbaab

abbaba

abbbaa

baaabb

baabab

baabba

babaab

bababa

babbaa

bbaaab

bbaaba

bbabaa

bbbaaa

🧑‍🏫 More Questions

Lab Report: 14 Bacteriophage Specificity 1. What was the purpose of this exercise? 2. Complete the following table with your observations: Lysis (yes/no) Name of the bacterium S. Aureus (+) Yes Yes E. Coli (-) No Ent. Aerogenes (-) 3. How do you know if bacteriophage infected the bacteria? You can see a plaque. 4. Why didn't the bacteriophage infect all three bacteria? flest Cell specificity What is the explanation for bacteriophage specificity when it comes to infecting specific bacterium? wiceptors

white house solar panel teas passage

Stratego: The object of the game is to capture the flag or capture/defeat all your opponent's pieces. Rank Piece No. per player Special properties B Bomb 6 Defeats any piece except Miner 1 Marshal 1 Can be defeated by the Spy N General 1 3 Colonel 2 4 Major 3 5 Captain 4. 6 Lieutenant 4 7 Sergeant 4 Miner 5 Can defuse bombs 8 9 Scout 8 S Spy 1 Can defeat the General or Marshal F Flag 1 Its capture ends the game Please create a Python program simulating a game of Stratego • Program must include Object/Class that creates the game pieces • Game will randomly generate 2 pieces (Player-1 vs. Player-2), winner of play determined by chart above (think the card game "War") • Although pieces are randomly generated, game should respect the odds/ratio of getting a particular piece • Game ends when one player captures the flag of their opponent

This question asks you to perform competitive analysis of transpose (TR) and frequency count (FC). (i) [5 marks] Suppose that you are maintaining a list of n elements under access operation only. The cost of access to the i-th element in the list is i. Let S be a  request sequence of m access operations over this list. For any suﬃciently large m, construct a request sequence S such that for this request sequence, the total cost of TR divided by the total cost of MTF is ω(1). (ii) [5 marks] Use the result of (i) to argue that TR is not competitive. Hint: You just have to use the deﬁnition of competitiveness. Therefore, You can  solve this subquestion without having to solve (i) ﬁrst. (iii) [5 marks] Further prove that FC is not competitive, either.

Problem 4 - Starfish Starfish are known for being able to regenerate their bodies from a single leg if it is detached. Though we will not be harming any starfish, we will by counting hypothetically the number of starfish we can create by cutting a five legged starfish into five parts. For our problem, a starfish will regenerate one leg per "turn." Once it gets all five of its legs back, we will separate it into five legs which will then each start regenerating into five separate starfish. Our goal is to count the number of starfish after a specified number of generations or turns. For instance, if you start with a 2 legged starfish and a 5 legged one, then the next turn you will have a 3 legged starfish from a turn of regeneration and then five arms (one legged starfish) that we've separated. So the list will go from [2,5] to [3,1,1,1,1,1]. If you have multiple five legged starfish you must repeat the process for each of them. As another example, if you have a list containing [3,3,4,5,5] you will end up with [4,4,5,1,1,1,1,1,1,1,1,1,1] on the next turn. Given the number of generations and a starting list of starfish legs, write a function: def starfish(leg_list, generations): Sample Output Using the driver code here: def count_starfish(leg_list): leg_counts ={1:0,2:0,3:0,4:0,5:0} for x in leg_list: leg_counts [x]+=1 return leg_counts print (count_starfish (starfish ([1, 2, 3, 4, 5], 3))) print (count_starfish (starfish ([2,4,5],10))) print (count_starfish (starfish ([5,5,5],1))) print (count_starfish (starfish ([1], 20))) print (count_starfish (starfish ([5, 5, 5, 5, 5], 5))) linux5[109]8 python starfish.py {1:5,2:5,3:5,4:1,5:1} {1:0,2:25,3:0,4:25,5:25} {1:15,2:0,3:0,4:0,5:0} {1:625,2:0,3:0,4:0,5:0} {1:0,2:0,3:0,4:0,5:25}

👉 Interested in exploring further?

Chrome Extension

1. Search answers from our 90+ million questions database.

2. Get instantly AI Solutions powered by most advanced models like GPT-4, Bard, Math GPT, etc.

3. Enjoy one-stop access to millions of textbook solutions.

4. Chat with 50+ AI study mates to get personalized course studies.

5. Ask your questions simply with texts or screenshots everywhere.

Get It

Compare

Legal