原创 Roman to Integertegerer
問題描述：Roman to Integer Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range f
2020-02-21 20:25:08
原创 Maximum Depth of Binary Tree
問題描述：Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of node
2018-08-26 02:29:03
原创 Longest Common Prefix
問題描述：Longest Common Prefix Write a function to find the longest common prefix string amongst an array of strings. 思路：
2018-08-26 02:29:02
2
原创 Add Two Numbers
問題描述：Add Two Numbers You are given two non-empty linked lists representing two non-negative integers. The digits are s
2018-08-26 02:29:02
原创 Remove Duplicates from Sorted Array
問題描述：Remove Duplicates from Sorted Array Given a sorted array, remove the duplicates in place such that each elemen
2018-08-26 02:29:01
原创 Single NumbererⅡ
題目描述：Single NumbererⅡ Given an array of integers, every element appears three times except for one, which appears
2018-08-26 02:29:01
1
原创 Single NumbererⅢ
題目描述：Single NumbererⅢ Given an array of numbers nums, in which exactly two elements appear only once and all the ot
2018-08-26 02:29:01
1
原创 Find the Difference
問題描述：Find the Difference Given two strings s and t which consist of only lowercase letters. String t is generated by r
2018-08-26 02:29:01
原创 Longest Substring Without Repeating Characters
問題描述：Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without r
2018-08-26 02:29:01
原创 Ugly Number
題目描述：Ugly Number Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers
2018-08-26 02:29:01
原创 Ugly Number II
問題描述：Ugly Number II Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factor
2018-08-26 02:29:01
原创 Container With Most Water
Container With Most Water 問題描述： Given n non-negative integers a1, a2, …, an, where each represents a point at coord
2018-08-26 02:29:01
2
原创 Single Number
問題描述：Single Number Given an array of integers, every element appears twice except for one. Find that single one. No
2018-08-26 02:29:01
3
原创 Palindrome Number
Palindrome Number 問題描述： Determine whether an integer is a palindrome. Do this without extra space. 思路：這個問題需要注意的第一個問題是
2018-08-26 02:28:59
3
原创 吝嗇SAT問題
問題描述： 吝嗇SAT問題是這樣的：給定一組子句（每個子句都是其中文字的析取）和整數k，求一個最多有k個變量爲true的滿足賦值——如果該賦值存在。證明吝嗇問題是NP-完全問題。 爲了幫助理解這個問題，我們寫解釋下什麼是SAT問題
2018-08-26 02:28:59