Expand a Compressed String | Dataford Interview Questions

Write code to expand a string like a4b3c5 into aaaabbbccccc.

Implement def expand_string(s):, where s contains character-count pairs and each count may contain one or more digits. Return the expanded string. Inputs are valid, counts are non-negative, and an empty input returns an empty string.

Constraints

0 <= len(s) <= 5000
Each valid pair contains one character followed by a non-negative decimal count
The expanded output length is at most 100000
The input contains no separators or whitespace

Function Signature

def expand_string(s):

Your question is Expand a Compressed String. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Write code to expand a string like a4b3c5 into aaaabbbccccc.

Constraints

0 <= len(s) <= 5000
Each valid pair contains one character followed by a non-negative decimal count
The expanded output length is at most 100000
The input contains no separators or whitespace

Function Signature

def expand_string(s):

Your question is Expand a Compressed String. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.