Recently I strengthened my DSA foundation by practicing STACK problems (Java). These are some of the most important interview-level questions I solved. 📌 Questions I practiced recently: 1) ...
📁 Arrays 🟢 Active 57 HashMap, Two Pointers, Greedy, Prefix Sum, Kadane's, Cyclic Sort, Floyd Cycle, Intervals, Binary Search, Binary Search on Answer, Heap ...
Day 9 – Valid Parentheses Implemented a solution to check whether a string of brackets is valid. Key Learnings: Understanding stack behavior (LIFO) Matching opening and closing brackets correctly ...
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