FastPrepCount Islands from Streaming Rows

Count Islands from Streaming Rows

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Problem statement

A binary matrix arrives one row at a time from top to bottom. Given those rows as the finite ordered batch rows, return an array where result i is the number of islands present after rows 0 through i have arrived.

The problem statement continues
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Examples

Example 1

rows = ["110","010","011"]return = [1,1,1]

Each new land cell joins the component that began in the first row.

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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