Stack :

1.ParenthesesCheckByUsingStack.java :

Sample input and output

Link to learn about Stack :https://hellohasan.com/2016/11/28/parentheses-balance-checking-stack/

Sorting :

1.BubbleSort.java :

Sample input and output

Link to learn about bubble sort : http://blog.anindyaspaul.com/2013/08/17/bubble-sort/

2. CountSort.java :

sample input and output

Link to learn about counting sort :http://blog.anindyaspaul.com/2013/12/06/counting-sort/