I use hackerrank as a fun way to challenge myself, if I find myself in a programming rut or just want to do a quick programming challenge I will pull up a hackerrank challenge and solve away.

Algorithm

dynamic programming

01-theCoinChangeProblem.php | Hackerrank Link

Greedy

01-minimumAbsoluteDifferenceInAnArray.php | Hackerrank Link

Implementation

01-gradingStudents.php | Hackerrank Link

02-appleAndOrange.php | Hackerrank Link

03-kangaroo.php | Hackerrank Link

48-theTimeInWords.php | Hackerrank Link

NP Complete

01-spiesRevised.php | Hackerrank Link

Warmup

01-solveMeFirst.php | Hackerrank Link

02-simpleArraySum.php | Hackerrank Link

03-compareTheTriplets.php | Hackerrank Link

04-aVeryBigSum.php | Hackerrank Link

05-diagnoalDifference.php | Hackerrank Link

06-plusMinus.php | Hackerrank Link

07-staircase.php | Hackerrank Link

08-miniMaxSum.php | Hackerrank Link

09-birthdayCakeCandles.php | Hackerrank Link

10-timeConversion.php | Hackerrank Link