Timer is Running

Java Collection | Set 1 (ArrayList) Part-2
Submissions: 2761   Accuracy:


  Difficulty: Easy   Marks: 2

Implement different operations on a ArrayList A .

The first line of input contains an integer T denoting the no of test cases . Then T test cases follow. The first line of input contains an integer Q denoting the no of queries . Then in the next line are Q space separated queries .
A query can be of five types 
1. a x (Adds an element x to the ArrayList A at the end )
2. b (Sorts the ArrayList A in ascending order )
3. c (Reverses the ArrayList A)
4. d (prints the size of the ArrayList)
5. e (prints space separated values of the ArrayList)
5. f  (Sorts the ArrayList A in descending order)

The output for each test case will  be space separated integers denoting the results of each query . 



a 4 a 6 a 7 b c e
a 55 a 11 d e

7 6 4
2 55 11

Explanation :
For the first test case

There are six queries. Queries are performed in this order
1. a 4 { ArrayList has 4  }
2. a 7 {ArrayList has 7 }
3. a 6 {ArrayList has 6}
4. b {sorts the ArrayList in ascending order, ArrayList now is 5 6 7}
5. c {reverse the ArrayList}
6. e {prints the element of the ArrayList 7 6 4}

For the sec test case 
There are four queries. Queries are performed in this order
1. a 55  (ArrayList A has 55}
2. a 11  (ArrayList A has 55 ,11}
3. d      (prints the size of the ArrayList A ie. 2 )
4. e      (prints the elements of the ArrayList A ie 55 11)

Note:The Input/Output format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.


** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Amit Khandelwal
Author: Amit Khandelwal 1

If you have purchased any course from GeeksforGeeks then please ask your doubt on course discussion forum. You will get quick replies from GFG Moderators there.

Need help with your code? Please use ide.geeksforgeeks.org, generate link and share the link here.

to report an issue on this page.