//print Kth path (given K integer and you need to find the path to reach this K as total sum in binary tree)
const printKthPath =(root ) =>{
let k =7 ;
if(root === null) return
let sum = 0 ;
let stack =[] ;
sum =sum +root.data ;
stack.push(root.data)
if(sum === k){
return stack
}else {
if(root.left)printKthPath(root.left )
if(root.right)printKthPath(root.right)
if(!root.right && ! root.left ){
sum = sum- root.data;
stack.pop();
}
}
return stack
}