Daily LeetCode Challenge #2267 | Valid Parentheses String Path | Java | 29-09-2026
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Daily LeetCode Challenge #2267 | Valid Parentheses String Path | Java | 29-09-2026
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SkillSpring
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230 просмотров · 2 нед. назад
🚀 Daily LeetCode Challenge #2267 – Check if There Is a Valid Parentheses String Path
Welcome to another Daily LeetCode Challenge by SkillSpring! 🌱
📅 Date: 29-09-2026
💻 Language: Java
🧩 Problem: #2267 – Check if There Is a Valid Parentheses String Path
In this video, we solve this challenging Grid + DFS + Memoization problem with a clear, step-by-step explanation.
We’ll understand how to move from the top-left cell to the bottom-right cell while ensuring that the parentheses formed along the path remain valid.
💡 Key Idea
At every cell, we keep track of:
📍 Current row and column
🔢 Current parentheses balance
➡️ Move right or down
✂️ Prune invalid paths when the balance becomes negative
🧠 Use memoization to avoid solving the same state repeatedly
📚 What You'll Learn
✅ Understand the problem statement
✅ Valid parentheses concept
✅ Grid traversal
✅ DFS / Recursion
✅ Backtracking
✅ Memoization / DP
✅ State = row + column + balance
✅ Pruning invalid paths
✅ Java implementation
✅ Time & Space Complexity
🔥 One LeetCode problem every day → stronger DSA skills every day!
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