itarticle random pick Weighted Random Sampling Shuffle Array Random pick with black list (LC710) Use random(m) to implement random(n) 0
itarticle Longest Word in DictionaryMaximum Length of Repeated SubarrayLargest Number At Least Twice of OthersReverse Linked ListFirst Missing PositiveFind the Duplicate NumberLZH007 Maximum Length of Repeated Subarray Largest Number At Least Twice of Others Reverse Linked List First Missing Positive Find the Duplicate Number 0
