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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. class Node {
  8. int data;
  9. List<Node> child;
  10.  
  11. public Node(int data, List<Node> child) {
  12. this.data = data;
  13. this.child = child;
  14. }
  15.  
  16. @Override
  17. public String toString() {
  18. return data+" "+child;
  19. }
  20. }
  21.  
  22. /* Name of the class has to be "Main" only if the class is public. */
  23. class Ideone
  24. {
  25. public static void main (String[] args) throws java.lang.Exception
  26. {
  27. List<Node> obj1 = new LinkedList<Node>();
  28.  
  29. obj1.add(new Node(10, Arrays.asList(new Node(4,null),new Node(20,Arrays.asList(new Node(2, null))),
  30. new Node(13,Arrays.asList(new Node(16, Arrays.asList(new Node(3, null))))) )));
  31. obj1.add(new Node(5, null));
  32. obj1.add(new Node(12,null));
  33. obj1.add(new Node(7,Arrays.asList(new Node(17, Arrays.asList(new Node(9, Arrays.asList(new Node(19, null),
  34. new Node(15, null))),new Node(8, null))
  35. ),new Node(6, null))
  36. ));
  37. obj1.add(new Node(11,null));
  38. System.out.println(obj1);
  39. }
  40. }
Success #stdin #stdout 0.04s 4386816KB
stdin
Standard input is empty
stdout
[10 [4 null, 20 [2 null], 13 [16 [3 null]]], 5 null, 12 null, 7 [17 [9 [19 null, 15 null], 8 null], 6 null], 11 null]