But here's the important part:

⚠️ A greedy choice doesn't automatically guarantee a globally optimal solution.

Learn to recognize when the greedy approach is actually justified.

1️⃣2️⃣ LEARN DYNAMIC PROGRAMMING LAST

Don't rush into DP. First become comfortable with: Recursion, Arrays, Hashing, Trees, State-based thinking

Then learn:

Memoization → Top-down

Tabulation → Bottom-up

The most important DP skill isn't memorizing formulas. It's identifying: "What is the state of this problem?"

1️⃣3️⃣ LEARN TIME & SPACE COMPLEXITY

For every solution, ask: How much time does it take? How much extra memory does it use?

Know the common patterns:

O(1) → Constant

O(log n) → Logarithmic

O(n) → Linear

O(n log n) → Linearithmic

O(n²) → Quadratic

1️⃣4️⃣ DON'T SOLVE RANDOM PROBLEMS

Organize your practice by topic.

For example: Arrays → Hashing → Two Pointers → Sliding Window → Stack → Linked List → Binary Search → Trees → Graphs → Greedy → DP

This makes patterns easier to recognize.

1️⃣5️⃣ REVISIT PROBLEMS YOU COULDN'T SOLVE

This is one of the most effective habits.

When you fail a problem, don't just memorize the answer. Ask:

👉 What concept did I miss?

👉 What clue should have helped me recognize the pattern?

👉 Why did my approach fail?

👉 Can I solve it now without looking?

Your mistakes reveal what you need to learn next.

1️⃣6️⃣ PRACTICE EXPLAINING YOUR SOLUTION

After solving a problem, explain:

Approach: What are you doing?

Why: Why does it work?

Complexity: How efficient is it?

Edge cases: What could break it?

This prepares you for the actual interview, not just the coding platform.

1️⃣7️⃣ USE AI THE RIGHT WAY

Use it to: 🤖 Explain a difficult concept, Give hints, Find bugs, Generate test cases, Compare two approaches, Explain complexity

But avoid: ❌ Asking for the solution immediately. Try the problem yourself first.

👉 Use AI as a tutor, not as a shortcut.

1️⃣8️⃣ BUILD A PROBLEM-SOLVING HABIT

You don't need to solve dozens of problems every day.

A consistent routine is better: Learn → Attempt → Get stuck → Debug → Understand → Re-solve → Review

Over time, you'll start recognizing patterns naturally.

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