Practice · judged on hidden tests
Problems
9 problems, ordered so each topic builds on the last.
- Not startedCombine the ranges that overlapArrays, Sorting, GreedyMedium
- Not startedGroup anagramsHash maps, Sorting, StringsMedium
- Not startedHow far the list is from sortedArrays, SortingHard
- Not startedHow many must you dropArrays, Sorting, GreedyMedium
- Not startedHow many triples add to zeroArrays, Sorting, Two pointersMedium
- Not startedMerging many sorted lists at onceArrays, Sorting, HeapsHard
- Not startedMost frequent numbersArrays, Hash maps, SortingMedium
- Not startedSorting 0s, 1s and 2s in one passArrays, Sorting, Two pointersMedium
- Not startedValid anagramHash maps, Sorting, StringsEasy