NeetCode 150, Easy problems

Easy problems

All 28 easy problems in the NeetCode 150, grouped by pattern category. Each link points at the same problem page used in the category lists.

Arrays & Hashing

• 1. Two Sum (Easy)
• 217. Contains Duplicate (Easy)
• 242. Valid Anagram (Easy)

Two Pointers

• 125. Valid Palindrome (Easy)

Sliding Window

• 121. Best Time to Buy and Sell Stock (Easy)

Stack

• 20. Valid Parentheses (Easy)

Binary Search

• 704. Binary Search (Easy)

Linked List

• 21. Merge Two Sorted Lists (Easy)
• 141. Linked List Cycle (Easy)
• 206. Reverse Linked List (Easy)

Trees

• 100. Same Tree (Easy)
• 104. Maximum Depth of Binary Tree (Easy)
• 110. Balanced Binary Tree (Easy)
• 226. Invert Binary Tree (Easy)
• 543. Diameter of Binary Tree (Easy)
• 572. Subtree of Another Tree (Easy)

Heap / Priority Queue

• 703. Kth Largest Element in a Stream (Easy)
• 1046. Last Stone Weight (Easy)

Intervals

• 252. Meeting Rooms (Easy)

1-D Dynamic Programming

• 70. Climbing Stairs (Easy)
• 746. Min Cost Climbing Stairs (Easy)

Math & Geometry

• 66. Plus One (Easy)
• 202. Happy Number (Easy)

Bit Manipulation

• 136. Single Number (Easy)
• 190. Reverse Bits (Easy)
• 191. Number of 1 Bits (Easy)
• 268. Missing Number (Easy)
• 338. Counting Bits (Easy)

Related

• Medium problems (99 problems)
• Hard problems (22 problems)
• LeetCode 150 (NeetCode) (full topic)