## Find Minimum in Rotated Sorted Array II

This is follow up to Find Minimum in Rotated Sorted Array. Suppose a sorted array is rotated at some pivot unknown to you beforehand, and duplicates are allowed. Find the minimum element.

## Find Minimum in Rotated Sorted Array

Suppose a sorted array is rotated at some pivot unknown to you beforehand (i.e., `[0, 1, 2, 4, 5, 6, 7]`

becomes `[4, 5, 6, 7, 0, 1, 2]`

). Find the minimum element.

## Heapify

Given an integer array, heapify it into a min-heap array. If there are multiple solutions, return any one.

## Sort Integers II

Given an integer array, sort it in ascending order. Use quick sort, merge sort, heap sort or any O(nlogn) algorithm.

## LRU Cache

Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: `get`

and `set`

.

## Evaluate Reverse Polish Notation

Evaluate the value of an arithmetic expression in Reverse Polish Notation.

## Reorder List

Given a singly linked list, L = {n_{1}, n_{2}, …, n_{n-1}, n_{n}}, reorder it so that L = {n_{1}, n_{n}, n_{2}, n_{n-1}, …}. Rearrange the nodes not just the values. Do it in place.

## Linked List Cycle

Given a linked list, determine if it has a cycle in it.

## Clone Graph

Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors.

## Flatten Nested List Iterator

Given a nested list of integers, implement an iterator to flatten it.