LeetCode 200. Number of Islands | JSer - JavaScript & Algorithm

Typical graph problem. to count isolated sub tree count, just use bfs/dfs to mark connected node/points. and then count the process

Hi I'm a JavaScript engineer who is not good at algorithms,
and currently practicing leetCode online. If you are interested, maybe we can learn together.

[eziotv]

actually you could have solved it without the walked []
by switching every 1 to 0 after you walk on it