Originally published on LeetCopilot Blog
Never solved a LeetCode problem before? This beginner-friendly guide walks you through exactly where to start, what to learn first, and how to build momentum.
LeetCode can feel overwhelming when you first start. Thousands of problems, confusing topics, and no clear path forward.
This guide is for complete beginners—people who have never solved a LeetCode problem or who are returning after a long break.
TL;DR: Getting Started Checklist
- ✅ Set up your account (pick a language)
- ✅ Learn basic data structures first
- ✅ Start with Easy problems (50+)
- ✅ Follow a structured list (NeetCode 75)
- ✅ Don't memorize—understand patterns
- ✅ Practice consistently (1 hour/day)
Step 1: Prerequisites
Before LeetCode, you need:
Basic Programming
- Variables, loops, conditionals
- Functions
- Arrays/lists
- Basic string operations
Basic Data Structures Knowledge
- Arrays
- Hash Maps/Dictionaries
- Linked Lists (basic understanding)
Don't have these yet? Start with:
- Python: Python.org tutorial
- JavaScript: freeCodeCamp
- Java: Oracle's Java tutorials
Step 2: Choose Your Language
Best languages for LeetCode:
| Language | Pros | Cons |
|---|---|---|
| Python | Shortest code, easy syntax | Slower runtime (rarely matters) |
| Java | Widely used, explicit types | More verbose |
| C++ | Fastest, STL | Steeper learning curve |
| JavaScript | Web developers comfortable | Less common in DSA |
My recommendation: Python for beginners. It's the most readable and lets you focus on the algorithm, not syntax.
Step 3: Your First Week
Day 1-2: Explore the Platform
- Create a free LeetCode account
- Go to Problems → Filter by Easy
- Solve "Two Sum" (Problem #1)
Two Sum is special: It's the most solved problem for a reason—it introduces hashing, a critical pattern.
Day 3-7: Easy Problems
Solve these 10 problems in order:
| # | Problem | Pattern |
|---|---|---|
| 1 | Two Sum | Hash Map |
| 2 | Valid Parentheses | Stack |
| 3 | Merge Two Sorted Lists | Linked List |
| 4 | Best Time to Buy/Sell Stock | Array |
| 5 | Valid Palindrome | Two Pointers |
| 6 | Reverse Linked List | Linked List |
| 7 | Contains Duplicate | Hash Set |
| 8 | Maximum Subarray | Kadane's Algorithm |
| 9 | Climbing Stairs | DP (Fibonacci) |
| 10 | Binary Search | Binary Search |
Step 4: How to Approach Each Problem
The 30-Minute Rule
- Read carefully (2 min) — Understand the problem
- Work through examples (3 min) — Trace inputs/outputs by hand
- Think of approach (5 min) — What data structure? What pattern?
- Write code (15 min) — Don't aim for perfect first try
- Test and debug (5 min) — Fix edge cases
If You're Stuck After 30 Minutes:
- Look at hints (if available)
- Read the first few lines of the discussion
- Watch a NeetCode video explanation
- Use LeetCopilot for contextual hints
Don't feel bad about looking at solutions! The goal is learning, not proving you're smart.
Step 5: Learn the Core Data Structures
Priority Order:
| Priority | Data Structure | Why Important |
|---|---|---|
| 1 | Arrays | Foundation for everything |
| 2 | Hash Maps/Sets | O(1) lookups, frequency counting |
| 3 | Two Pointers | Common array/string technique |
| 4 | Stacks | Parentheses, monotonic patterns |
| 5 | Linked Lists | Classic interview topic |
| 6 | Trees | Very frequently asked |
| 7 | Graphs | BFS/DFS patterns |
| 8 | Heaps | Priority queues |
| 9 | Dynamic Programming | Learn after the basics |
Step 6: Follow a Structured List
Don't solve random problems. Follow a curated list:
Best Lists for Beginners:
| List | Problems | Best For |
|---|---|---|
| NeetCode 75 | 75 | Short, focused prep |
| Grind 75 | 75-169 | Customizable schedule |
| NeetCode 150 | 150 | Comprehensive prep |
| Blind 75 | 75 | Classic original list |
My recommendation: Start with NeetCode 75—it has free video explanations for every problem.
Step 7: Building a Practice Routine
Daily Schedule (1 hour):
| Time | Activity |
|---|---|
| 0-10 min | Review yesterday's problem |
| 10-40 min | Solve 1 new problem |
| 40-60 min | Study the solution/pattern |
Weekly Goals:
| Week | Goal |
|---|---|
| Week 1 | 10 easy problems |
| Week 2-3 | 15 easy problems |
| Week 4+ | Mix easy + medium |
Step 8: When to Move to Medium
Move to Medium problems when you can:
- ✅ Solve most Easy problems in 15-20 minutes
- ✅ Recognize patterns (Two Pointers, Hash Map, etc.)
- ✅ Write bug-free code on first try (mostly)
Typical timeline: 3-4 weeks of consistent practice
Common Beginner Mistakes
| Mistake | Fix |
|---|---|
| Trying Hards too soon | Stick to Easy for 2-3 weeks |
| Solving random problems | Follow NeetCode 75 |
| Memorizing solutions | Understand the pattern |
| Not reviewing problems | Revisit problems weekly |
| Practicing inconsistently | 1 hour daily beats 5 hours Saturday |
| Giving up after getting stuck | Looking at solutions is part of learning |
Resources for Beginners
Free:
- NeetCode YouTube — Video explanations
- LeetCode Explore — Free learning cards
- Tech Interview Handbook — Free guide
Paid (optional):
- AlgoMonster — Pattern-based course
- LeetCode Premium — Company tags
AI Assistance:
- LeetCopilot — Get hints when stuck without spoiling the solution
FAQ
I have no CS degree. Can I still do LeetCode?
Absolutely! Many self-taught developers have aced coding interviews.
How many problems should I solve?
Quality over quantity. 50-75 well-understood problems is a great start.
Should I use LeetCode Premium?
Not necessary for beginners. The free tier has plenty.
How long until I'm interview-ready?
With consistent practice: 3-6 months for most people.
What if I can't solve anything?
Start with easier problems. Everyone struggles at first—it's normal.
Week 1 Action Plan
| Day | Task |
|---|---|
| Day 1 | Set up account, solve Two Sum |
| Day 2 | Solve Valid Parentheses, Contains Duplicate |
| Day 3 | Solve Best Time to Buy/Sell Stock |
| Day 4 | Solve Reverse Linked List |
| Day 5 | Solve Maximum Subarray |
| Day 6 | Solve Climbing Stairs |
| Day 7 | Review all problems from the week |
Conclusion
Starting LeetCode is simpler than it seems:
- Choose Python (or your preferred language)
- Follow NeetCode 75 (structured list)
- Practice daily (1 hour is enough)
- Understand patterns (don't memorize)
- Use hints when stuck (LeetCopilot)
Everyone starts at zero. The key is consistency—one problem a day adds up to 365 problems a year.
Good luck on your journey!
If you're looking for an AI assistant to help you master LeetCode patterns and prepare for coding interviews, check out LeetCopilot.
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