JavaList.java

/* Java List
For this problem, we have  types of queries you can perform on a List:
Insert  at index :
Insert
x y
Delete the element at index :
Delete
x
Given a list, , of  integers, perform  queries on the list. Once all queries are completed, 
print the modified list as a single line of space-separated integers.
Input Format
The first line contains an integer,  (the initial number of elements in ). 
The second line contains  space-separated integers describing . 
The third line contains an integer,  (the number of queries). 
The  subsequent lines describe the queries, and each query is described over two lines:
If the first line of a query contains the String Insert, then the second line contains 
two space separated integers , and the value  must be inserted into  at index.
If the first line of a query contains the String Delete, then the second line contains index, 
whose element must be deleted from .
Constraints
Each element in is a 32-bit integer.
Output Format
Print the updated list  as a single line of space-separated integers.
Sample Input
5
12 0 1 78 12
2
Insert
5 23
Delete
0
Sample Output
0 1 78 12 23
 
*/
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class JavaList
{

	public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
    
        int numElements = Integer.parseInt(sc.nextLine());
        ArrayList<Integer> numList = new ArrayList<>();
    
        for(int i = 0;i < numElements;i++){
            numList.add(sc.nextInt());
        }
    
        int numQueries = sc.nextInt();
        sc.nextLine();
    
        for(int i = 0;i < numQueries;i++)
        {
            String queryType = sc.nextLine();
          
            if(queryType.equals("Insert"))
            {
                String[] queryArray = sc.nextLine().split(" ");
                numList.add(Integer.parseInt(queryArray[0]),Integer.parseInt(queryArray[1]));
            }
          else
          {
                int removeIndex = Integer.parseInt(sc.nextLine());
                numList.remove(removeIndex);
            }  
        }
    
        for(Integer num : numList)
        {
            System.out.print(num+" ");
        }
    }
}