Trees..not returning any output

#1

link to ques :https://hack.codingblocks.com/contests/c/457/1284

https://ide.codingblocks.com/#/s/19302

i wish to build BST and print preorder but it shows no output

#2

https://ide.codingblocks.com/#/s/19307

#3

sir in the question we were given to construct a BST and not a binary tree

#4

i have created a BST when in a BST u do in order traversal u got a sorted array ,i have done that first sort the array and then form the BST