Lucid Interview Questions — 8 DSA Problems

8 problems with full solutions in Python, Java, C++, JavaScript, Go, Rust.

Most frequently asked Lucid LeetCode questions for software engineering interviews.

• Collect Coins in a Tree (HARD) — Array, Tree, Graph, Topological Sort
• Maximum Number of Balls in a Box (EASY) — Hash Table, Math, Counting
• Valid Parentheses (EASY) — String, Stack
• Min Stack (MEDIUM) — Stack, Design
• Generate Parentheses (MEDIUM) — String, Dynamic Programming, Backtracking
• Longest Substring Without Repeating Characters (MEDIUM) — Hash Table, String, Sliding Window
• Gas Station (MEDIUM) — Array, Greedy
• Number of Islands (MEDIUM) — Array, Depth-First Search, Breadth-First Search, Union Find, Matrix