Meta‑Style LeetCode Question List

✅ Easy

# Title Link Done
1 Two Sum 🔗 LeetCode ☐
217 Contains Duplicate 🔗 LeetCode ☐
242 Valid Anagram 🔗 LeetCode ☐
283 Move Zeroes 🔗 LeetCode ☐
349 Intersection of Two Arrays 🔗 LeetCode ☐
206 Reverse Linked List 🔗 LeetCode ☐
21 Merge Two Sorted Lists 🔗 LeetCode ☐
141 Linked List Cycle 🔗 LeetCode ☐

🟡 Medium

# Title Link Done
3 Longest Substring Without Repeating Characters 🔗 LeetCode ☐
15 3Sum 🔗 LeetCode ☐
49 Group Anagrams 🔗 LeetCode ☐
56 Merge Intervals 🔗 LeetCode ☐
75 Sort Colors 🔗 LeetCode ☐
102 Binary Tree Level Order Traversal 🔗 LeetCode ☐
200 Number of Islands 🔗 LeetCode ☐
207 Course Schedule 🔗 LeetCode ☐
210 Course Schedule II 🔗 LeetCode ☐
215 Kth Largest Element in an Array 🔗 LeetCode ☐
347 Top K Frequent Elements 🔗 LeetCode ☐
438 Find All Anagrams in a String 🔗 LeetCode ☐
560 Subarray Sum Equals K 🔗 LeetCode ☐
128 Longest Consecutive Sequence 🔗 LeetCode ☐

🟥 Hard

# Title Link Done
4 Median of Two Sorted Arrays 🔗 LeetCode ☐
76 Minimum Window Substring 🔗 LeetCode ☐
30 Substring with Concatenation of All Words 🔗 LeetCode ☐
895 Maximum Frequency Stack 🔗 LeetCode ☐
432 All O`one Data Structure 🔗 LeetCode ☐
124 Binary Tree Maximum Path Sum 🔗 LeetCode ☐
297 Serialize and Deserialize Binary Tree 🔗 LeetCode ☐
146 LRU Cache 🔗 LeetCode ☐
355 Design Twitter 🔗 LeetCode ☐

🛠 Design & Misc (Side Topics)

Title Link
Design Facebook News Feed / Feed System —
Design Commenting / Live Comments System —
Design Ticket Booking System —
Ad Click Aggregator —
Design Memcache / Cache System —
Design Instagram Stories / Live —