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Lucid

6 problems · 3 with a MIK video · 0 asked in the last 6 months
D · DSA 3
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6 problems, most frequent first

DoneLC #ProblemLevelHow often askedMIK video
2603Collect Coins in a Tree ↗Hard100Not covered yet
1742Maximum Number of Balls in a Box ↗Easy100Not covered yet
200Number of IslandsArraysMedium78▶ Watch
20Valid ParenthesesStackEasy78▶ Watch
155Min Stack ↗Medium69Not covered yet
236Lowest Common Ancestor of a Binary TreeTreesMedium69▶ Watch

Source: community data (liquidslr/leetcode-company-wise-problems), updated Aug 16, 2026. Company tags are crowd-reported and may be incomplete.