Why the DP State Machine Works | Best Time to Buy & Sell Stock II | LeetCode 122 скачать в хорошем качестве

Why the DP State Machine Works | Best Time to Buy & Sell Stock II | LeetCode 122

Everyone solves LeetCode 122 with greedy. But the DP State Machine approach reveals the deeper structure of the problem — two states, two transitions, one clean recurrence. In this video, I prove why the state machine is correct and how it generalises to the entire stock problem family. WHAT YOU'LL LEARN: ✅ How to model stock trading as a DP state machine ✅ Why DP beats greedy in insight — even when both give O(n) ✅ How to extend this exact template to LC 309 (Cooldown) and LC 123 (2 transactions) 📌 PROBLEM LINK: https://leetcode.com/problems/best-ti... PREVIOUS VIDEO →   • LeetCode 121 Explained Mathematically | Be...   ──────────────────────────────── 🔔 Subscribe for deep mathematical & DP explanations of LeetCode problems, CSES solutions, and system design case studies — for people who want to understand, not memorize. ──────────────────────────────── #LeetCode #LeetCode122 #DynamicProgramming #DP #StateMachine #DSA #DataStructuresAndAlgorithms #CodingInterview #LeetCodeMedium #CompetitiveProgramming #FAANG #SoftwareEngineering #codewithsouldev #BuySellStock #DPStateMachine #CPP #Python #Java #LeetCodeDP