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Symmetry CombinationSolved Oct 24, 2025
Problem
The task is to print a pattern shaped like a half-diamond, given a size N. The pattern increases from 1 to N characters and then decreases back to 1.
Reading the solution first feels like progress, but it makes the next similar problem — and the interview version — much harder, because you skipped the part where you figure it out. Give it an honest 20–30 minutes. Stuck? Re-read the pattern, watch the concept video, or try the brute force first.
Hidden: approach · solution code