Question

Write code in python for following

Use queue to implement it

Implement a decryption method String decrpt(String s) to decrypt a number sequence (stored in a string s).

The decryption algorithm works as follows:

1. Delete the first element of the sequence
2. Move the first element of the sequence to the end
3. Delete the first element of the sequence
4. Move the first element of the sequence to the end

….

This process keeps running until all element in the sequence has been deleted. Then we put all deleted element together and output the result.

E.g.

Input: “631758924”

Output: “615947283”

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

Note: Please maintain proper code spacing (indentation), just copy the code part and paste it in your compiler/IDE directly, no modifications required.

#code

#required method
def decrypt(s):
    #creating an empty string to store the deleted characters or the decrypted
    #text
    deleted=''
    #looping until s becomes empty
    while len(s)>0:
        #getting first character of s
        first=s[0]
        #removing first character from s
        #note that s[1:] returns a substring of s with first character removed
        s=s[1:]
        #appending first to deleted
        deleted+=first
        #checking if s is not empty
        if len(s)>0:
            #moving first character to the last
            s=s[1:]+s[0]
    #after the loop, returning deleted text
    return deleted

#testing the decrypt method
print(decrypt("631758924")) #615947283

#output

615947283