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$s = @($input)[0] $words = $s -split '(?=[A-Z])' Write-Output $words.Count Regex split with lookahead. 8. Example 5: Sorting and Filtering – "Birthday Cake Candles" Problem: Count how many tallest candles exist (maximum height). Cmdlet pipeline: $lines = @($input) $n = [int]$lines[0] $heights = $lines[1].Trim() -split ' ' | ForEach-Object [int]$_ $max = ($heights | Measure-Object -Maximum).Maximum ($heights | Where-Object $_ -eq $max ).Count | Write-Output

Group-Object with dynamic script block. 6. Example 3: "Mini-Max Sum" – Cmdlet Pipeline Mastery Problem: Given 5 integers, find the minimum sum of 4 elements and maximum sum of 4 elements. Elegant solution: $lines = @($input) $arr = $lines[0].Trim() -split ' ' | ForEach-Object [int]$_ $total = ($arr | Measure-Object -Sum).Sum $minElem = ($arr | Measure-Object -Minimum).Minimum $maxElem = ($arr | Measure-Object -Maximum).Maximum Write-Output "$($total - $maxElem) $($total - $minElem)" powershell 3 cmdlets hackerrank solution

Measure-Object -Sum , Measure-Object -Minimum , Measure-Object -Maximum . 7. Example 4: String Problems – "CamelCase" (Count words) Problem: Count the number of words in a camelCase string (first letter lowercase, each new word starts with uppercase). Pure cmdlet solution: $s = @($input)[0] $count = 1 + (($s -split '(?=[A-Z])') | Where-Object $_ -ne '' ).Count - 1 Write-Output $count Better without double counting:

Write-Output "$aliceScore $bobScore"

# Read all lines into an array $lines = @($input) # Or read line by line $firstLine = Read-Host # not recommended – use [Console]::ReadLine() Better approach:

Introduction: Why PowerShell 3 on HackerRank? PowerShell is no longer just a Windows administration tool; it has become a powerful cross-platform scripting language. HackerRank includes PowerShell 3.0 as an available language for solving algorithm, data structure, and Linux shell-style problems. However, many developers attempt to use PowerShell like C# or Python, missing the elegance and conciseness of cmdlets . But : $s = @($input)[0] $words = $s -split '(

[Math]::Abs($primary - $secondary) | Write-Output