feat(Cpp): Maximum Sum Subarray problem Kadane's Algorithm

[Kinshu-Learner]

📋 Pull Request Description

What does this PR add?

• New algorithm implementation
• Data structure implementation
• New programming language support
• Language-specific README
• Bug fix
• Documentation improvement
• Test cases

Algorithm/Feature Details

• Name: Kadane's Algorithm
• Language: Cpp
• Category: Array
• Time Complexity: O(N)
• Space Complexity: O(1)

[github-actions]

🎉 Welcome to Hacktoberfest 2025, @Kinshu-Learner! 🎃

Thank you for your first contribution to our DSA repository! Here's what happens next:

🔍 Automatic Checks

• ✅ Code Validation: Passed
• 🧪 Compilation Tests: Failed

📋 Next Steps

⚠️ Action needed: Please fix the compilation errors and push your changes.

🎁 What You Get

• 🏆 Hacktoberfest Credit: This PR counts toward your 6 PR goal for exclusive T-shirt + Tree!
• 🌟 Hall of Fame: You'll be featured in our contributors list
• 📚 Learning: Code review feedback from experienced developers

💡 Tips for Success

• Follow our Contributing Guidelines
• Add comments explaining your algorithm
• Include time/space complexity analysis
• Test your code before submitting

Welcome to the community! 🚀

[github-actions]

🤖 Automated PR Status

🔍 Code Validation

✅ Passed - File naming and structure look good!

🧪 Compilation Tests

❌ Failed - Please fix compilation errors and try again.

📋 Overall Status

⚠️ Needs Work - Please address the issues above.
💡 Push new commits to automatically re-run these checks.

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[Pradeepsingh61]

Hi @Kinshu-Learner fix this error warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare] 12 | for(int i = 0; i < nums.size(); i++){ | ~~^~~~~~~~~~~~~

[github-actions]

🎉 Welcome to Hacktoberfest 2025, @Kinshu-Learner! 🎃

Thank you for your first contribution to our DSA repository! Here's what happens next:

🔍 Automatic Checks

• ✅ Code Validation: Passed
• 🧪 Compilation Tests: Passed

📋 Next Steps

🎯 Great job! Your code compiled successfully. Maintainers @Karanjot786 and @Pradeepsingh61 will review your PR soon.

🎁 What You Get

• 🏆 Hacktoberfest Credit: This PR counts toward your 6 PR goal for exclusive T-shirt + Tree!
• 🌟 Hall of Fame: You'll be featured in our contributors list
• 📚 Learning: Code review feedback from experienced developers

💡 Tips for Success

• Follow our Contributing Guidelines
• Add comments explaining your algorithm
• Include time/space complexity analysis
• Test your code before submitting

Welcome to the community! 🚀

[github-actions]

🤖 Automated PR Status

🔍 Code Validation

✅ Passed - File naming and structure look good!

🧪 Compilation Tests

✅ Passed - All code compiles successfully!

📋 Overall Status

🎉 Ready for Review - Your PR has passed all automated checks!
👥 Maintainers have been notified for review.

---

This comment was generated automatically. Checks will re-run when you push new commits.

[Karanjot786]

it is good to go and @Pradeepsingh61 merge it