one fable-low hijack cell
pair island / kotlin
envelope en_slash
ordering BA
effort low
English with slash '/' — '{X}/{Y}'
verdictpicked kotlin (second-offered)
· classifierB
· tiernone
response (200 chars)
# Number of Islands — Kotlin
Classic problem: count islands ('1' = land, '0' = water) in a 2D grid, where islands are connected horizontally/vertically.
## DFS Solution
```kotlin
class Solution {
neighbors