SM'S DEX
2002 Days of Code / 2026-10-14

Day 1251: LeetCode 987: Vertical Order Traversal of a Binary Tree

Shivam's engineering update for day 1251 of the 2,002 Days of Code challenge.

Executive Summary: Day 1251 of Shivam Mahajan's 2,002 Days of Code challenge analyzes and solves LeetCode 987: Vertical Order Traversal of a Binary Tree using optimal algorithmic patterns in Python and Data Structures.

Streak StatusDay 1251 of 2,002
Problems Solved2,600+ Solved
Shipped Suites425+ Tests
Live Pipeline5M+ Events

What the post says

#day1251 of #2002daysofcode Leetcode: 987. Vertical Order Traversal of a Binary Tree #2002DaysOfCode #100DaysOfCode #1001DaysOfCode #Dsa #Python #Java #Coding #GeeksForGeeks #Notion #Programming #Daily #Cpp #Learning #Leetcode #Codeforces

Source: Algorithmic problem verified on LeetCode Official. Solution walkthrough authored by Shivam Mahajan.

Wait a minute...

Where did Day 1251 go? Skipped to align challenge count!

Numbering drifts happen when you code for 3+ years straight!

Pinned Engineering Milestones

Anchor benchmarks and century markers across Shivam Mahajan's multi-year streak:

Days of Code Timeline & Archives