Java Collection | Set 2 (Set)
Easy Accuracy: 29.43% Submissions: 2058 Points: 2

Implement different operations on a set s .

Input:
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 four types 
1. a x (inserts an element x to the set s)
2. b (prints the contents of the set s in increasing order)
3. c x (erases an element x from the set s)
4. d x (prints 1 if the element x is present in the set else print -1)
5. e (prints the size of the set s)

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

Constraints:
1 <= T <= 100
1 <= Q <= 100

Example:
Input:
2
6
a 1 a 2 a 3 b c 2 b
5
a 1 a 5 e d 5 d 2

Output:
1 2 3 1 3
2 1 -1

Explanation :
Testcase 1:

There are six queries. Queries are performed in this order
1. a 1     { insert 1 to set now set has {1} }
2. a 2     {inserts 2 to set now set has {1,2} }
3. a 3     {inserts 3 to set now set has {1,2,3} }
4. b        {prints the set contents ie 1,2,3}
5. c 2     {removes 2 from the set }
6. b        {prints the set contents ie 1,3}

Testcase 2:
There are five queries. Queries are performed in this order
1. a 1     {inserts 1 to set now set has {1}}
2. a 11   {inserts 11 to set now set has {1,11}}
3. e        {prints the size of the set ie 2}
4. d 5     {since five is present prints 1}
5. d 2     {since 2 is not present in the set prints -1}

 

to report an issue on this page.

Editorial

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

Yes

All Submissions

My Submissions:

Login to access your submissions.