Pattern

Grid DFS / Flood Fill

4 problems in the roadmap use this pattern.

• Flood Fill Easy

  in Graphs (BFS, DFS, Grid)

• Number of Islands Medium

  in Graphs (BFS, DFS, Grid)

  Reported at: AmazonMicrosoftMeta+16
• Max Area of Island Medium

  in Graphs (BFS, DFS, Grid)

  Reported at: AmazonMetaMicrosoft+4
• Count Sub Islands Medium

  in Graphs (BFS, DFS, Grid)