The original Elements of Programming Interviews repository can be found here.
The book containing the problems can be found here Elements of Programming Interviews.

Elements of Programming Interviews (Java)

This repository contains solutions with detailed explanations for exercises from Elements Of Programming Interviews by Adnan Aziz, Tsung-Hsien Lee, and Amit Prakash.
Additionaly, there are some proposed solutions to variant exercises and matching problems from LeetCode.

Primitive Types

Problem	LeetCode	Variants
Bootcamp: CountBits
5.1 Parity
5.2 SwapBits
5.3 ReverseBits
5.4 ClosestIntSameWeight		ClosestIntSameWeightConstantTime
5.5 PrimitiveMultiply
5.6 PrimitiveDivide
5.7 PowerXY
5.8 ReverseDigits
5.9 IsNumberPalindromic
5.10 UniformRandomNumber
5.11 RectangleIntersection		FourPointsFormRectangle ❌ RectangleIntersectionNotAlignedXY

Arrays

Problem	LeetCode	Variants
Bootcamp: EvenOddArray
6.1 DutchNationalFlag		DutchNationalFlagWithoutPivot MauritiusNationalFlag BooleanValuedKeysFlag BooleanValuedKeysFlagWithRelativeTrueOrder
6.2 IntAsArrayIncrement		AddBinary
6.3 IntAsArrayMultiply
6.4 AdvanceByOffsets		MinimumStepsAdvanceByOffsets
6.5 SortedArrayRemoveDups		ArrayRemoveKey SortedArrayMTimes
6.6 BuyAndSellStock		LongestSubArrayWithEqualEntries
❌6.6 BuyAndSellStockTwice (todo)		BuyAndSellStockTwiceLinearTime
6.8 PrimeSieve
6.9 ApplyPermutation		InversePermutation
6.10 NextPermutation		ComputeKthPermutation ComputePreviousPermutation
6.11 OfflineSampling		RandStandardC
6.12 OnlineSampling
6.13 RandomPermutation
❌6.14 RandomSubset (todo)
6.15 NonuniformRandomNumber		NonuniformRandomNumberExpDist

Multidimensional Arrays

Problem	LeetCode	Variants
6.16 IsValidSudoku
6.17 SpiralOrderingSegments		GenerateMatrixFromSpiralOrder GenerateMatrixFromPSequence EnumeratePairsInSpiralOrder SpiralOrderingForMxNMatrix LastElementSpiralOrderingForMxNMatrix KThElementSpiralOrderingForMxNMatrix
6.18 MatrixRotation		MatrixReflection
6.19 PascalTriangle		PascalTriangleNthRowUsingNSpace

In progress...

Strings

Problem	LeetCode	Level	Similar questions	Variants
7.4 Replace and remove				TelexEncoding, MergeTwoSortedArrays
7.5 Test palindromicity	https://leetcode.com/problems/valid-palindrome/	💚 Easy	Valid Palindrome II, Palindrome Linked List
7.6 Reverse all the words in a sentence	https://leetcode.com/problems/reverse-words-in-a-string/	💛 Medium	Reverse Words in a String II
7.7 Compute all mnemonics for a phone number	https://leetcode.com/problems/letter-combinations-of-a-phone-number/	💛 Medium	Generate Parentheses, Combination Sum, Binary Watch