Number of Islands

medium Points: 100

Problem Statement

Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands.

Constraints

  • 1 ≤ n ≤ 105
  • Input is a list of integers

Examples

Input: [2, 7, 11, 15], target = 9
Output: [0, 1]
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