原创 Surrounded Regions
Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'. A region is captured by flipping al
2018-09-03 17:32:45
原创 Best Time to Buy and Sell Stock IV
Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find t
2018-09-03 17:32:45
1
原创 Wildcard matching
Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any
2018-09-03 17:32:45
原创 Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example, Give
2018-09-03 17:32:45
原创 Shortest Palindrome
Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return
2018-09-03 17:32:45
原创 Candy
There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these child
2018-09-03 17:32:45
原创 Max Points on a Line
Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. /* * A line
2018-09-03 17:32:45
3
原创 word search II
Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed
2018-09-03 17:32:45
原创 Minimum Window Substring
Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity
2018-09-03 17:32:45
原创 LRU cache
Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:
2018-09-03 17:32:45
原创 Valid Number
public class Solution { public boolean isNumber(String s) { s = s.trim(); boolean pointSeen = false; bo
2018-09-03 17:32:45
原创 Regular Expression Matching
Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches ze
2018-09-03 17:32:45
3
原创 Word Ladder II(BFS + DFS)
Given two words (beginWord and endWord), and a dictionary's word list, find all shortest transformation sequence(s) f
2018-09-03 17:32:45
原创 Expression Add Operators
Given a string that contains only digits 0-9 and a target value, return all possibilities to add binaryoperators (no
2018-09-03 17:32:45
2
原创 數組：Remove Element&Merge Sorted Array&First Missing Positive
Remove Element public int removeElement(int[] nums, int val) { int count = 0; for(int i=0;i<nums.length
2018-09-03 17:32:45