Majority Element | Java program to demonstrate insert operation in binary search tree . ; A utility function to create a new BST node ; A utility function to insert a new node with given key in BST ; If the tree is empty , return a new node ; Otherwise , recur down the tree ; Find the max count ; Return the ( unchanged ) node pointer ; A utility function to do inorder traversal of BST ; Driver Code ; Function call
import java . io . * ; class Node { int key ; int c = 0 ; Node left , right ; } class GFG { static int ma = 0 ; static Node newNode ( int item ) { Node temp = new Node ( ) ; temp . key = item ; temp . c = 1 ; temp . left = temp . right = null ; return temp ; } static Node insert ( Node node , int key ) { if ( node == null ) { if ( ma == 0 ) ma = 1 ; return newNode ( key ) ; } if ( key < node . key ) node . left = insert ( node . left , key ) ; else if ( key > node . key ) node . right = insert ( node . right , key ) ; else node . c ++ ; ma = Math . max ( ma , node . c ) ; return node ; } static void inorder ( Node root , int s ) { if ( root != null ) { inorder ( root . left , s ) ; if ( root . c > ( s / 2 ) ) System . out . println ( root . key + "NEW_LINE"); inorder ( root . right , s ) ; } } public static void main ( String [ ] args ) { int a [ ] = { 1 , 3 , 3 , 3 , 2 } ; int size = a . length ; Node root = null ; for ( int i = 0 ; i < size ; i ++ ) { root = insert ( root , a [ i ] ) ; } if ( ma > ( size / 2 ) ) inorder ( root , size ) ; else System . out . println ( "No majority elementNEW_LINE"); } }