FastPrepCount Islands with Eight-Direction Adjacency
Problem · Array

Count Islands with Eight-Direction Adjacency

● MediumAmazon logoAmazonFULLTIMEPHONE SCREEN
See Amazon hiring insights

Problem statement

Given a rectangular binary matrix grid, return the number of islands.

The problem statement continues
Pro

Examples

Example 1

grid = [[1,0,1],[0,1,0],[1,0,1]]return = 1

Every land cell connects to the center diagonally, so all five cells form one island.

FastPrep Pro
Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 2 more worked examples, explained
  • Guided hints and editorial
  • Run your code on real test cases
$8.25/month

$99 billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week
CodePython 3
Run and Submit unlock with Pro
FastPrep Pro
Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 2 more worked examples, explained
  • Guided hints and editorial
  • Run your code on real test cases
$8.25/month

$99 billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week