The repo consists of solutions to numerous problems using different data structures and algorithms, all coded in Java. It also contains solutions to HackerRank problems which I have solved so far and questions from Cracking the Coding Interview Book (6th Edition).

You can also refer to my Java Notes for a quick refresh on the Java concepts. Lastly, feel free to connect with me on Twitter for any queries or concerns. All the best!

1. Basic Practice:
   1. Arrays
      • ArrangeNosToFormBiggestNo
      • BooleanMatrix
      • CelebrityProblem
      • ConsecutiveElements
      • CountDivisors
      • CountSmallerElementsOnRHS
      • DistinctPairs
      • DuplicatesInArray
      • DuplicatesInArrayWithinKDistance
      • EqualProbabilityRandomNoGenerator
      • EquilibriumIndex
      • FixedPoint
      • FlattenArray
      • IntersectionAndUnionOf2SortedArrays
      • InversionsInArray
      • KLargestElements
      • KthLargestElement
      • LargestProductContiguousSubArray
      • LargestSumContiguousSubArray
      • LeadersInArray
      • LongestBitonicSubArray
      • LongestConsecutiveSubsequence
      • MajorityElement
      • MajorityElementInSortedArray
      • MatrixInSpiral
      • MaxDiffWithLargerElementAfterSmallerElement
      • MaxInAllSubArrays
      • MaxIndexDiff
      • MaxMinWithMinComparisons
      • MaxSpan
      • MaximumSizeSquareSubMatrix
      • MaximumSumNonAdjacentSubSequence
      • MedianOfStream
      • MedianOfTwoSortedArrays
      • MergeArrayOfNIntoArrayOfMPlusN
      • MinimumDistanceBetweenTwoNos
      • MissingAndRepeatingElements
      • MissingNumber
      • NextGreaterElement
      • NextLargerNumber
      • NthSmallestNumber
      • NumberOccurringOddTimes
      • OccurrencesInSortedArray
      • PairDiff
      • PairSum
      • PivotedBinarySearch
      • ProductArrayPuzzle
      • ReservoirSampling
      • ReverseArray
      • RotateArray
      • RotateMatrixBy90Degrees
      • RotatedIndex
      • SearchInSorted2DArray
      • Segregate0s1sAnd2s
      • Segregate0sAnd1s
      • SegregateEvenAndOddNos
      • SmallestAndSecondSmallest
      • SmallestMissingNumber
      • SortedSubSequence
      • SubArrayOfSum
      • SubsetOfArray
      • SymmetricDifference
      • TripletOfSum
      • TwoElementsSumClosestToZero
      • TwoRepeatingElements
      • TwoStacksInOneArray
      • UnsortedSubArray
   2. Backtracking
   3. Bits
   4. Blockchain Demo
   5. Dynamic Programming
   6. Graphs
   7. Java 8
   8. Linked Lists
   9. Miscellaneous
   10. Permutations
   11. Searching
   12. Sorting
   13. Stacks
   14. Strings
   15. Threads
   16. Trees
2. Cracking the Coding Interview:
   1. Arrays and Strings
   2. Linked Lists
   3. Stacks and Queues
   4. Trees and Graphs
   5. Bit Manipulation
   6. Recursion and DP
3. LeetCode.
4. HackerRank.

Java version 1.8.0_172
Java(TM) SE Runtime Environment (build 1.8.0_172-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.172-b11, mixed mode)

IntelliJ IDEA 2018.1.4 (Ultimate Edition)

MacBook Pro
2.5 GHz Intel Core i7
16 GB 1600 MHz DDR3