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  1. /* package whatever; // don't place package name! */
  2. // how to print all subarrays ending at i
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		 int[] arr = {1, 2, 3};
  13.         int n = arr.length;
  14.  
  15.         List<List<Integer>> arrOutside = new ArrayList<>();
  16.  
  17.         for (int i = 0; i < n; i++) {
  18.             for (int j = 0; j <=i ; j++) {
  19.                 List<Integer> arrInside = new ArrayList<>();
  20.                 for (int k = j; k<=i; k++) {
  21.                     arrInside.add(arr[k]);
  22.                 }
  23.                 arrOutside.add(arrInside);
  24.             }
  25.         }
  26.  
  27.         System.out.println(arrOutside);
  28.     }
  29.  
  30. }
Success #stdin #stdout 0.09s 52572KB
comments (?)
stdin 
Standard input is empty
stdout 
[[1], [1, 2], [2], [1, 2, 3], [2, 3], [3]]
https://ideone.com/gv0vAt
language:
Java (HotSpot 12)
created:
30 days ago
visibility:
public

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