Help with approach

#1

prob: https://hack.codingblocks.com/app/contests/2022/253/problem

will it work if to the orignal string I append the ascii values of the characters of the string and then use then generate all the subsequences

#2

No it will not work
because it will generate a97
b98 ab9798
and maybe more unwanted subseq

#3

This is same as generating all subseq
with three choices
take it as char
take it as ascii
leave it