Convert the given string

Question

Remove the repeated neighbouring alphabets into single alphabet

example
input=aaaaabbbbhhhhddddidhjjjj
output=abhdidhj

Answer 1

https://code.sololearn.com/cmJduLTjVMp4/#cpp

Answer 2

https://code.sololearn.com/cXwsrJPAyEeq/?ref=app