Скачать или смотреть LeetCode 139: Word Break | CSharp Solution | Dynamic Programming

📝 In this problem, we need to determine if a string can be segmented into words from a given dictionary. An elegant #dynamicprogramming approach helps us solve this efficiently with optimal #memoization.

⏱️ **Time Complexity**: O(n²), where n is the length of the string
💾 **Space Complexity**: O(n) for our DP array

TIMESTAMPS
00:00 - Understanding problem statement
01:07 - Brute Force Approach
03:02 - Big O Notation calculated
03:29 - Using Dynamic Programming
04:36 - DP - Running simulation
09:10 - Big O Notation calculated
09:48 - C# code walk-through
11:04 - Solution analysis - runtime + memory
11:12 - Conclusion

KEY CONCEPTS
Dynamic Programming
Memoization
String manipulation
Dictionary lookups
Bottom-up approach

LEARNING POINTS
How to recognize when to use dynamic programming for string problems
Efficient handling of dictionary lookups using HashSet
Converting recursion with overlapping subproblems to DP
Optimizing space complexity in string segmentation problems

RELATED PROBLEMS
LeetCode 140: Word Break II
LeetCode 472: Concatenated Words
LeetCode 1048: Longest String Chain
LeetCode 2707: Extra Characters in a String

TARGET AUDIENCE
This video is ideal for software engineers preparing for technical interviews, C# developers looking to improve algorithm skills, and computer science students studying dynamic programming concepts.

PREREQUISITES
Basic understanding of C# syntax
Familiarity with arrays and HashSets
Understanding of recursion
Fundamental knowledge of dynamic programming concepts

LINKS
📋 Problem: https://leetcode.com/problems/word-br...
💻 Solution Code: https://leetcode.com/problems/word-br...

ADDITIONAL TIPS
Pay special attention to handling the base case in the DP solution
Watch for time limits when dealing with very long input strings
Consider using a Trie data structure for an alternative approach when dictionary is very large

🔔 If you found this solution helpful, please SUBSCRIBE to the channel and hit the notification bell! Share your questions or alternative approaches in the comments below. #leetcode #csharp #dynamicprogramming #codinginterview #algorithms