The function accepts a string ‘ str’ of length n and two characters ‘ch1’ and ‘ch2’ as its arguments . Implement the function to modify and return the string ‘ str’ in such a way that all occurrences ...

# you can replace any letter in the string with another letter at most k times. # Find the length of a longest substring containing all repeating letters # you can get after performing the above ...

The Python programming language serves as a flexible platform for desktop and Web development. Part of Python's ease of use comes from its extensive list of data types, which include powerful ...