This is a premium problem. We're working on making it available for free soon.
Use these hints if you're stuck. Try solving on your own first.
Find all synonymous groups of words.
Use union-find data structure.
By backtracking, generate all possible statements.
Solutions for this premium problem will be available for free soon.
Browse Free ProblemsWatch expert explanations and walkthroughs
Practice problems asked by these companies to ace your technical interviews.
Explore More ProblemsJot down your thoughts, approach, and key learnings
Backtracking is used to generate all possible sentence variations by replacing words with their synonyms. It recursively explores every valid option for each word in the sentence. This ensures all combinations are produced without missing valid outputs.
Yes, problems like Synonymous Sentences are common in technical interviews because they test graph connectivity, union-find concepts, and backtracking. They also evaluate a candidate's ability to combine multiple data structures and generate combinations efficiently.
The optimal approach combines Union Find to group synonymous words and backtracking to generate all valid sentence variations. Union Find efficiently merges related synonyms into connected components. Backtracking then explores all replacement combinations for words in the sentence.
Union Find (Disjoint Set Union) is ideal for grouping synonym relationships because it efficiently merges and finds connected components. A hash map is also used to map each root word to its list of synonyms for quick lookup during sentence generation.
