Leetcode

Introduction This comprehensive guide contains 500 curated LeetCode problems organized for efficient interview preparation. Each problem includes: ✅ Interactive checkboxes for progress tracking 🔥 Priority markers for must-solve problems 🟢🟡🔴 Difficulty indicators (Easy/Medium/Hard) Pattern tags for systematic learning Study Recommendations Beginner Path (3-4 months): Start with Easy problems in Array & Hash Table Master Two Pointers and Sliding Window patterns Build foundation with Trees and Linked Lists Practice 2-3 problems daily Intermediate Path (2-3 months): ...

Triangle Minimum Path Sum: Given a triangle array, return the minimum path sum from top to bottom. Key Constraint: From position (i, j), you can only move to (i+1, j) or (i+1, j+1). Example: [2] [3,4] [6,5,7] [4,1,8,3] Minimum path: 2 → 3 → 5 → 1 = 11 Quick Start: The 5-Minute Solution Intuition (Think Like a Human) Imagine you’re at the top and need to reach the bottom with minimum cost. At each step, ask: “Which path below me is cheaper?” ...