Run-length decompression

Question

CS student here. I want to write a program that will decompress a string that has been encoded according to a modified form of run-length encoding (which I\'ve already written c

Answer 1

Here is a working implementation in python. This also works fine for 2 or 3 or multiple digit numbers

inputString="a1b3s22d4a2b22"
inputString=inputString+"\0"                 //just appending a null char
charcount=""
previouschar=""
outputString=""

for char in inputString:
  if char.isnumeric():
    charcount=charcount+char  
  else:
    outputString=outputString
    if previouschar:
      outputString=outputString+(previouschar*int(charcount))   
    charcount=""
    previouschar=char
    
print(outputString) // outputString= abbbssssssssssssssssssssssffffddaabbbbbbbbbbbbbbbbbbbbbb