Welcome! In this repository you can find a collection of coding challenges from CodeSignal.

Solutions are written in Java and MySql.

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Contents:

• Arcade
  • Intro
  • Databases
• Interview Practice
  • Data Structures

Arcade

Intro

#	Challenge	Difficulty	Solution
1	add	Easy	Solution
2	centuryFromYear	Easy	Solution
3	checkPalindrome	Easy	Solution
4	adjacentElementsProduct	Easy	Solution
5	shapeArea	Easy	Solution
6	makeArrayConsecutive2	Easy	Solution
7	almostIncreasingSequence	Easy	Solution
8	matrixElementsSum	Easy	Solution
9	allLongestStrings	Easy	Solution
10	commonCharacterCount	Easy	Solution
11	isLucky	Easy	Solution
12	sortByHeight	Easy	Solution
13	reverseInParentheses	Medium	Solution
14	alternatingSums	Easy	Solution
15	addBorder	Easy	Solution
16	areSimilar	Medium	Solution
17	arrayChange	Easy	Solution
18	palindromeRearranging	Medium	Solution
19	areEquallyStrong	Easy	Solution
20	arrayMaximalAdjacentDifference	Easy	Solution
21	isIPv4Address	Medium	Solution
22	avoidObstacles	Easy	Solution
23	boxBlur	Medium	Solution
24	minesweeper	Medium	Solution
25	arrayReplace	Easy	Solution
26	evenDigitsOnly	Easy	Solution
27	variableName	Easy	Solution
28	alphabeticShift	Easy	Solution
29	chessBoardCellColor	Easy	Solution
30	circleOfNumbers	Easy	Solution
31	depositProfit	Medium	Solution
32	absoluteValuesSumMinimization	Medium	Solution

Databases

#	Challenge	Difficulty	Solution

Interview Practice

Data Structures

Topic	Challenge	Difficulty	Solution
Arrays	firstDuplicate	Easy	Solution