0ms |C++貪婪mask dp解Leetcode難題3734 Lexico min Palindrome greater then target
這部影片詳細解析了 LeetCode 3734 難題。我們將結合「貪婪演算法 (Greedy)」與「位元遮罩動態規劃 (Bitmask DP)」技術，目標是找出比給定字串大、且字典序最小的回文字串。影片中展示了如何透過剪枝與狀態壓縮將效能優化至 0ms，達成最速解。適合想挑戰高難度演算法與 C++ 實作技巧的開發者。
In this video, we tackle LeetCode 3734 (Hard) by combining a Greedy strategy with Bitmask DP. The goal is to find the lexicographically smallest palindrome greater than the target string. I'll walk you through the logic of state compression and pruning techniques to achieve a 0ms execution time. Perfect for anyone looking to master advanced C++ optimization and competitive programming patterns.
English timestamps based on your content:
00:00 - Problem Introduction: LeetCode 3734
00:41 - Problem Analysis & Requirements
01:54 - Examples Walkthrough (Example 1-3)
03:49 - Constraints & Complexity Discussion
04:37 - Core Strategy: Greedy + Bitmask Optimization
06:33 - Constructing the Smallest Palindrome Greater Than Target
07:33 - DP Implementation Details & State Transitions
08:51 - can_place Function Logic (Bitmasking & Recursion)
14:47 - Backtracking & Memoization
15:13 - Main Greedy Loop Implementation
19:11 - Building the Final Palindrome (Mirroring)
20:10 - Code Review & Summary
22:11 - Final Result: 0ms Submission
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