Lucid

8 questions tracked8 with solutions

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Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 8 of 8 questions

HardCollect Coins in a Tree✓ Our Solution

100

ArrayTreeGraphTopological Sort

EasyMaximum Number of Balls in a Box✓ Our Solution

100

Hash TableMathCounting

EasyValid Parentheses✓ Our Solution

StringStack

StackDesign

MediumGenerate Parentheses✓ Our Solution

StringDynamic ProgrammingBacktracking

MediumLongest Substring Without Repeating Characters✓ Our Solution

Hash TableStringSliding Window

MediumGas Station✓ Our Solution

ArrayGreedy

MediumNumber of Islands✓ Our Solution

ArrayDepth-First SearchBreadth-First SearchUnion Find+1