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a guest Jan 29th, 2018 50 Never
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  1. void top_view(Node root)
  2. {
  3.     top_view(root, 0);
  4. }
  5.  
  6. void top_view(Node root, int side)
  7. {
  8.     if (root != null) {
  9.         if (side <= 0) {
  10.             top_view(root.left, -1);
  11.         }
  12.        
  13.         System.out.print(root.data + " ");
  14.        
  15.         if (side >= 0) {
  16.             top_view(root.right, 1);
  17.         }
  18.     }
  19. }
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