feat: add Single Number II explanation #105

	# GitHub Actions workflow for validating repository structure
	# This is a template for future use

	name: Validate Repository Structure

	on:
	push:
	branches: [ main, master ]
	pull_request:
	branches: [ main, master ]

	jobs:
	validate:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Validate folder structure
	run: \|
	echo "Validating repository structure..."
	# Add validation logic here in the future
	echo "✅ Repository structure validation passed"

	- name: Check README format
	run: \|
	echo "Checking README.md format..."
	if [ -f "README.md" ]; then
	echo "✅ README.md exists"
	else
	echo "❌ README.md not found"
	exit 1
	fi

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