Sort Binary Array in Linear Time

Given an binary array, sort it in linear time and constant space. Output should print contain all zeroes followed by all ones.

Floor and Ceil in a Binary Search Tree

Given a BST, find floor and ceil of a given key in it. If the given key lie in the BST, then both floor and ceil is equal to that key, else ceil is equal to next greater key (if any) in the BST and floor is equal to previous greater key (if any) in …

Find inorder predecessor for given key in a BST

Given a BST, find in-order predecessor of a given key in it. If the given key do not lie in the BST, then return the previous greater key (if any) present in the BST.   An in-order predecessor of a node in BST is the previous node in in-order traversal of it.