Short Encoding of Words

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Solution Guide: Short Encoding of Words

Approach

Insert reversed words into trie in descending length order. Add length only when the word contributes new nodes.

Complexity Analysis

Time
O(M * L)
Space
O(M * L)

Pattern

Reverse Trie Deduplication

Why It Works

If a word is suffix of a longer word, its path already exists in reversed trie and adds no new encoded characters.

Updated Feb 2026