FastPrepFind Minimum City Hops
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Find Minimum City Hops

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Problem statement

You are given an array of cities named cities. Each city is represented by a three-character lowercase string.

Two cities are directly connected when their strings differ in exactly one character position.

The problem statement continues
Pro

Examples

Example 1

cities = ["abc","abd","acd","xyz"]startCity = "abc"endCity = "acd"return = 2

One shortest route is abc to abd to acd. Each hop changes exactly one character, so the route uses 2 hops.

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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