Question

Реализуйте алгоритм расшифровки сжатой строки из предыдущей задачи: сжатая строка 'a4b2с1a2' преобразуется в 'aaaabbсaa' Напишите программу, которая считывает строку и расшифровывает её. Sample Input 1: a4b2с1a2 Sample Output 1: aaaabbсaa Sample Input 2: B5b4A5a4 Sample Output 2: BBBBBbbbbAAAAAaaaa Программу написать в Python.

Answer 1

Ответ:

s = input()

s_out = ''

for i in range(len(s)):

   if s[i].isdigit():

       s_out += s[i - 1] * int(s[i])

print(s_out)

Объяснение:

Answer 2

Algorithm for Decoding Compressed String

To decode a compressed string, we need to iterate through the string and reconstruct the original string based on the compressed format. Here's an algorithm to achieve this:

1. Initialize an empty string to store the decoded result. 2. Iterate through the compressed string character by character. 3. If the current character is a letter, append it to the result string. 4. If the current character is a digit, convert it to an integer and repeat the previous letter in the result string that many times. 5. Continue this process until the end of the compressed string is reached. 6. Return the decoded string as the final result.

Python Implementation

Here's a Python program that implements the above algorithm:

def decode_compressed_string(compressed_string):
    decoded_string = ""
    i = 0

while i < len(compressed_string):
        if compressed_string[i].isalpha():
            decoded_string += compressed_string[i]
            i += 1
        elif compressed_string[i].isdigit():
            count = int(compressed_string[i])
            decoded_string += decoded_string[-1] * (count - 1)
            i += 1

return decoded_string

# Test the program
compressed_string = input("Enter the compressed string: ")
decoded_string = decode_compressed_string(compressed_string)
print("Decoded string:", decoded_string)

Example Usage

Sample Input 1: ``` a4b2с1a2 ``` Sample Output 1: ``` aaaabbсaa ```

Sample Input 2: ``` B5b4A5a4 ``` Sample Output 2: ``` BBBBBbbbbAAAAAaaaa ```

You can run the program and enter the compressed string to get the decoded result.

Please let me know if you need any further assistance!