DIY: Decode Ways
Explore how to decode numeric strings mapped from letters A-Z and calculate the number of valid ways to interpret them. This lesson helps you understand decoding logic and implement a function to solve such problems, enhancing your readiness for coding interviews involving string manipulation and dynamic programming.
We'll cover the following...
We'll cover the following...
Problem statement
A message containing the letters from A-Z can be encoded into a string of numbers, using the following mapping:
'A' -> "1"
'B' -> "2"
...
'Z' -> "26"
To decode an encoded message, all the digits must be grouped and then mapped back into letters, using the reverse of the mapping ...