## Insertion Sort List

Sort a linked list using insertion sort.

You have two numbers represented by a linked list, where each node contains a single digit. The digits are stored in reverse order, such that the 1’s digit is at the head of the list. Write a function that adds the two numbers and returns the sum as a linked list.

## Remove Nth Node From End of List

Given a linked list, remove the nth node from the end of list and return its head.

## Flip Bits

Determine the number of bits required to flip if you want to convert integer n to integer m.

Given two binary strings, return their sum (also a binary string).

## Convert Sorted Array to Binary Search Tree With Minimal Height

Given a sorted (increasing order) array, Convert it to create a binary tree with minimal height. There may exist multiple valid solutions, return any of them.

## Plus One

Given a non-negative number represented as an array of digits, plus one to the number.

## Reverse Integer

Reverse digits of an integer. Returns 0 when the reversed integer overflows (signed 32-bit integer).

## Subtree

You have two every large binary trees: T1, with millions of nodes, and T2, with hundreds of nodes. Create an algorithm to decide if T2 is a subtree of T1.

## Delete Node in the Middle of Singly Linked List

Implement an algorithm to delete a node in the middle of a singly linked list, given only access to that node.