dsa2 min read
Number of Islands — DFS/BFS Flood Fill
Count connected land components in a binary grid using DFS flood fill or BFS. Classic easy problem, foundation for all island variants.
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Flood-fill
2 articles
dsa2 min read
Flood Fill — DFS Color Replace
Implement the flood fill algorithm (like paint bucket tool): replace all cells of the same color reachable from a starting cell.
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