🚀 LeetCode Roadmap (Beginner → Advanced → Interview-Ready)
- mirglobalacademy
- Nov 27, 2025
- 2 min read
✅ Phase 1 — Foundation (2–3 weeks)
Goal: Learn the building blocks of DSA.
1. Learn Basic Data Structures
Arrays
Strings
HashMaps / HashSets
Stacks
Queues
Two Pointers
Sliding Window
LeetCode Must-Do (Beginner):
Two Sum
Best Time to Buy and Sell Stock
Valid Anagram
Valid Parentheses
Maximum Subarray
Contains Duplicate
Product of Array Except Self
Group Anagrams
✅ Phase 2 — Core Patterns (3–6 weeks)
Goal: Master patterns used in 80% of interview problems.**
1. Sliding Window
Longest Substring Without Repeating Characters
Minimum Window Substring
2. Binary Search
Search in Rotated Sorted Array
Find First/Last Position
Koko Eating Bananas
3. Two Pointers
3Sum
Container With Most Water
4. Prefix Sum
Subarray Sum Equals K
Range Sum Query
5. Recursion + Backtracking
Subsets
Permutations
Combination Sum
N-Queens
✅ Phase 3 — Advanced Patterns (4–8 weeks)
Goal: Learn interview killer topics.**
1. Trees
BFS (Level Order)
DFS (Pre/In/Post-order)
Binary Search Trees
Diameter of Tree
Lowest Common Ancestor
2. Graphs
BFS / DFS
Number of Islands
Clone Graph
Topological Sort
Shortest Path (Dijkstra)
3. Dynamic Programming
Learn in this order:
Fibonacci DP
Climbing Stairs
House Robber
Coin Change
Longest Increasing Subsequence
Longest Common Subsequence
0/1 Knapsack
✅ Phase 4 — LeetCode Patterns
Goal: Master the 15 main patterns used everywhere.**
These patterns are GOLD:
Sliding Window
Two Pointers
Fast & Slow Pointers (Cycle detection)
Binary Search
Prefix Sum
Hashing
Recursion
Backtracking
BFS
DFS
Dynamic Programming
Greedy
Heap / Priority Queue
Graph (Directed/Undirected)
Bit Manipulation
✅ Phase 5 — Mock Interviews (2–4 weeks)
Goal: Become interview-ready.**
Practice:
LeetCode Top Interview 150
Blind 75
NeetCode 150
System Design Basics (very high-level)
Caching
Load Balancer
Rate Limiting
Scalability basics
🧠 Perfect Weekly Study Plan (Fast Learning)
Week | Focus | Progress |
1 | Arrays + Hashing + Strings | Easy → Medium |
2 | Two Pointers + Sliding Window | Medium |
3 | Stack + Queue + Binary Search | Medium |
4 | Trees + BST | Medium |
5 | Graphs | Medium |
6 | DP Basics | Medium |
7 | DP Advanced | Medium/Hard |
8 | Mock Interviews + Review | Strong |
🔥 Blind 75 (Highly Recommended)
If you only do one list → do this.
🏋️ Daily Practice Rule
Every day:
1 easy
1 medium
1 revisit old question
Read solution + patterns
Consistency beats intelligence.
📘 Want a 30-Day LeetCode Study Plan?
Just say: "Make a 30-day LeetCode plan" I will create a day-by-day schedule for you.
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