Matrix

  • No. 200. Number of Islands: DFS

  • No. 305: Number of Islands II: DFS + Path Compression(roots[id] = roots[roots[id]];) solution

  • No. 694: Number of Distinct Islands BFS + set (translation | set of all points: (x, y) -> (x - top, y - left))sol

  • No. 711: Number of Distinct Islands II (Lintcode: No. 433 Number of Islands): sol2

  • No. 240 Search a 2D Matrix II: Divide and conquer for 4 blocks; Search row and column step by step; Saddleback Search

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