Questions
Status
Sum of subarray rangesHardWrite codeWrite codeHard35 minConsistent hashing ringHardWrite codeAmazon styleWrite codeAmazon styleHard35 minCount-Min SketchHardWrite codeDatabricks styleWrite codeDatabricks styleHard32 minSubset sum inversionHardWrite codeGoogle styleWrite codeGoogle styleHard32 minMaximum pads that seatHardWrite codeWrite codeHard35 minRegister motif under renamingHardWrite codeWrite codeHard35 minRoute packet to ruleHardWrite codeCisco styleWrite codeCisco styleHard35 min
Bitmap block allocatorHardWrite codeApple styleWrite codeApple styleHard35 minIndex intersection mergeHardWrite codeOracle styleWrite codeOracle styleHard30 minBinomial coefficient modulo primeHardWrite codeCitadel styleWrite codeCitadel styleHard35 minModular multiplicative inverseHardWrite codeWrite codeHard30 minMaximum XOR subsetHardWrite codeWrite codeHard35 minGeneralized Chinese remainder theoremHardWrite codeWrite codeHard35 minLongest subarray GCDHardWrite codeWrite codeHard35 minChinese remainder theoremHardWrite codeCitadel styleWrite codeCitadel styleHard35 minPrimes in rangeHardWrite codeCitadel styleWrite codeCitadel styleHard30 minExtended Euclidean algorithmHardWrite codeWrite codeHard30 minCatalan number modulo primeHardWrite codeCitadel styleWrite codeCitadel styleHard30 minMiller-Rabin primality testHardWrite codeCitadel styleWrite codeCitadel styleHard35 minGeometric series moduloHardWrite codeWrite codeHard30 minFibonacci moduloHardWrite codeWrite codeHard35 minCoprime pairs mobius inversionHardWrite codeWrite codeHard35 minDiscrete logarithm modulo primeHardWrite codeWrite codeHard40 minSolve two congruencesHardWrite codeWrite codeHard35 min
The second-highest salary in each departmentHardSQLSQLHard14 minA running total of revenue by dateHardSQLSQLHard14 minEach salary against the department bestHardSQLSQLHard12 minThe most recent hire in each departmentHardSQLSQLHard13 minPaid and refunded side by sideHardSQLSQLHard13 minEach customer's previous order dateHardSQLSQLHard13 minEach customer's largest paid orderHardSQLSQLHard14 minOrdered within thirty days of signing upHardSQLSQLHard13 minSigned up, viewed, purchasedHardSQLMeta styleSQLMeta styleHard14 minUsers active on more than one dayHardSQLSQLHard14 minThe first event of every sessionHardSQLSQLHard15 minDid each user ever purchaseHardSQLSQLHard13 minWho was subscribed on a given dayHardSQLSQLHard15 minEach post's share of its author's viewsHardSQLSQLHard13 minPosts beating their author's averageHardSQLSQLHard13 minTransactions that do not balanceHardSQLStripe styleSQLStripe styleHard14 minA running cash balanceHardSQLSQLHard15 minZero in stock is not the same as no rowHardSQLSQLHard14 minOut of stock everywhereHardSQLSQLHard14 minThe biggest line in each warehouseHardSQLSQLHard13 minRank within each courseHardSQLSQLHard15 minStudents with the most enrolmentsHardSQLSQLHard13 minEnrolled in Databases but not NetworksHardSQLSQLHard13 minThe whole reporting chainHardSQLSQLHard16 minSplit the company into salary quartilesHardSQLSQLHard13 minThe middle salaryHardSQLSQLHard14 min