Update BasicOperations.java

Author: noob-entity

Binary Tree/BasicOperations.java

@@ -27,7 +27,7 @@ public static int max(Node node) {
 
  public static int height(Node node) {
  if(node==null)
- return 0;
+ return -1;
  int lmax=height(node.left);
  int rmax=height(node.right);
  return Math.max(lmax,rmax)+1;