喜刷刷

Implement wildcard pattern matching with support for  '?'  and  '*' . '?' Matches any single character. '*...

Implement regular expression matching with support for  '.'  and  '*' . '.' Matches any single character. '*...

Word Ladder I Given two words ( start  and  end ), and a dictionary, find the length of shortest transformation sequence from  start  to ...

Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked list...

Given an unsorted integer array, find the first missing positive integer. For example, Given  [1,2,0]  return  3 , and  [3,4,-1,1]  ret...

Given a collection of intervals, merge all overlapping intervals. For example, Given  [1,3],[2,6],[8,10],[15,18] , return  [1,6],[8,10]...

Given a set of  non-overlapping  intervals, insert a new interval into the intervals (merge if necessary). You may assume that the interv...

Given a string containing just the characters  '('  and  ')' , find the length of the longest valid (well-formed) parenthes...

Given  n  non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rect...

Unique Binary Search Trees I Given  n , how many structurally unique  BST's  (binary search trees) that store values 1... n ? For e...

Given a string  S  and a string  T , count the number of distinct subsequences of  T  in  S . A subsequence of a string is a new string w...