Number of Distinct Islands

Try to solve the Number of Distinct Islands problem.

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Statement

Given an m x n binary matrix where 11 represents land and 00 represents water. An island is a group of connected 1s1s that are adjacent horizontally or vertically. Two islands are considered the same if one matches the other without rotating or flipping. The task is to return the number of distinct islands.

Constraints:

  • m == grid.length

  • n == grid[i].length

  • 1≤1 \leq m, n ≤100\leq100

  • grid[i][j] is either 00 or 11.

Examples

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