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Challenge Points: 10
Level: EasyYou are given a string s containing digits and the character #. This string represents an encoded message.
The decoding rules follow these mappings:
The numbers 1–9 correspond directly to letters 'a'–'i'.
The numbers 10–26, when followed by #, map to letters 'j'–'z'.
Your job is to convert the encoded string into the decoded lowercase English alphabet string.
You are guaranteed that the encoding is always valid and maps to exactly one possible output.
Input: s = "20#5#3"
Output: "tes"
Explanation:
20# → 't', 5 → 'e', 3 → 'c'
Input: s = "1 2 3 4 5" → Actually encoded without spaces: "12345"
Output: "abcde"
Explanation:
Each number maps individually: 1→a, 2→b, 3→c, 4→d, 5→e
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