Question 1

Collect Coins in a Tree — Lucid Interview Question

Accepted Answer

"Collect Coins in a Tree" is a hard difficulty problem asked at Lucid interviews. It covers the following topics: Array, Tree, Graph, Topological Sort. You can practice it on LeetCode: https://leetcode.com/problems/collect-coins-in-a-tree

Question 2

Maximum Number of Balls in a Box — Lucid Interview Question

Accepted Answer

"Maximum Number of Balls in a Box" is a easy difficulty problem asked at Lucid interviews. It covers the following topics: Hash Table, Math, Counting. You can practice it on LeetCode: https://leetcode.com/problems/maximum-number-of-balls-in-a-box

Question 3

Valid Parentheses — Lucid Interview Question

Accepted Answer

"Valid Parentheses" is a easy difficulty problem asked at Lucid interviews. It covers the following topics: String, Stack. You can practice it on LeetCode: https://leetcode.com/problems/valid-parentheses

Question 4

Min Stack — Lucid Interview Question

Accepted Answer

"Min Stack" is a medium difficulty problem asked at Lucid interviews. It covers the following topics: Stack, Design. You can practice it on LeetCode: https://leetcode.com/problems/min-stack

Question 5

Generate Parentheses — Lucid Interview Question

Accepted Answer

"Generate Parentheses" is a medium difficulty problem asked at Lucid interviews. It covers the following topics: String, Dynamic Programming, Backtracking. You can practice it on LeetCode: https://leetcode.com/problems/generate-parentheses

Question 6

Longest Substring Without Repeating Characters — Lucid Interview Question

Accepted Answer

"Longest Substring Without Repeating Characters" is a medium difficulty problem asked at Lucid interviews. It covers the following topics: Hash Table, String, Sliding Window. You can practice it on LeetCode: https://leetcode.com/problems/longest-substring-without-repeating-characters

#	Question Title	Difficulty	Frequency	Topics
1	Collect Coins in a Tree	HARD	100.0	ArrayTreeGraph+1
2	Maximum Number of Balls in a Box	EASY	100.0	Hash TableMathCounting
3	Valid Parentheses	EASY	73.8	StringStack
4	Min Stack	MEDIUM	73.8	StackDesign
5	Generate Parentheses	MEDIUM	64.9	StringDynamic ProgrammingBacktracking
6	Longest Substring Without Repeating Characters	MEDIUM	64.9	Hash TableStringSliding Window
7	Gas Station	MEDIUM	64.9	ArrayGreedy
8	Number of Islands	MEDIUM	64.9	ArrayDepth-First SearchBreadth-First Search+2

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