Mapped strings question

#1

Not able to write correct logic
Please tell correct approach

#2

Hello @dsingh200021,

Let’s understand the question first.
Consider two examples:

  1. Let’s Start with 1023;

    [1,2,3] =ABC
    [1,23]=AW
    [10,2,3]=JBC
    [10,23]=JW

  2. Now, coming to the next example 1432

    [1,4,3,2]=ADCB
    [14,3,2]=NCB

Notes:

  1. BTW you have to consider the case of single 0 between non-zero digits only. Rest you can ignore.
    It may be assumed that the input contains valid digits from 0 to 9 and there are no leading 0’s, no extra trailing 0’s and no two or more consecutive 0’s.

  2. The range of numbers that you can consider is from 1 to 26, not more than 26.

You can refer to the following code for better understanding:

Hope, this would help.
Give a like, if you are satisfied.