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Practice

Problems

Sandboxed coding rounds that run against a hidden test suite, and written questions graded against a rubric. Both, in one list.

FormatCoderpadWritten
Leveleasymediumhard
Topicimplementationsystem-designhldtreesdistributed-systemsarrays-hashingconcurrencygraphsbinary-searchconsistencydp-1dlinked-list

23 problemsClear filters

Practice problems, with your status, difficulty and topics
StatusProblemFormatLevel
Not startedBest Time to Buy and Sell Stockimplementationsliding-windowCoderpadeasy
Not startedBinary Searchbinary-searchimplementationCoderpadeasy
Not startedClimbing Stairsdp-1dimplementationCoderpadeasy
Not startedContains Duplicatearrays-hashingimplementationCoderpadeasy
Not startedDiameter of Binary TreeimplementationtreesCoderpadeasy
Not startedFind a pair summing to a target, in a sorted arrayarraystwo-pointersWritteneasy
Not startedFix: Deduplicate While Preserving OrderdebuggingCoderpadeasy
Not startedFix: The Page That Skips RowsdebuggingCoderpadeasy
Not startedInvert Binary TreeimplementationtreesCoderpadeasy
Not startedKth Largest Element in a StreamheapimplementationCoderpadeasy
Not startedLast Stone WeightheapimplementationCoderpadeasy
Not startedLinked List Cycleimplementationlinked-listCoderpadeasy
Not startedMaximum Depth of Binary TreeimplementationtreesCoderpadeasy
Not startedMerge Booking WindowsimplementationCoderpadeasy
Not startedMerge Two Sorted Listsimplementationlinked-listCoderpadeasy
Not startedNumber of 1 Bitsbit-mathimplementationCoderpadeasy
Not startedReverse Linked Listimplementationlinked-listCoderpadeasy
Not startedSingle Numberbit-mathimplementationCoderpadeasy
Not startedSubtree of Another TreeimplementationtreesCoderpadeasy
Not startedTwo Sumarrays-hashingimplementationCoderpadeasy
Not startedValid Anagramarrays-hashingimplementationCoderpadeasy
Not startedValid Palindromeimplementationtwo-pointersCoderpadeasy
Not startedValid ParenthesesimplementationstackCoderpadeasy