原创 Construct the Rectangle
For a web developer, it is very important to know how to design a web page’s size. So, given a specific rectangular
2020-02-21 00:22:06
原创 Excel Sheet Column Title
Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 1 -> A 2
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原创 Word Pattern
Given a pattern and a string str, find if str follows the same pattern. Examples: pattern = “abba”, str = “dog ca
2020-02-21 00:22:06
原创 求兩個字符串最長公共子串的長度
function maxCharLen(s1,s2) { var res = 0; for(var i = 0; i < s1.length; i++) { if(s2.indexOf(s1.charA
2020-02-21 00:22:06
原创 Isomorphic Strings
Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can
2020-02-21 00:22:06
原创 Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For
2020-02-21 00:22:06
原创 Relative Ranks
Given scores of N athletes, find their relative ranks and the people with the top three highest scores, who will be
2020-02-21 00:22:06
原创 Perfect Number
We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except its
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原创 merge sorted array
Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. //方法1 function merge(n
2020-02-21 00:22:06
原创 Assign Cookies
Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at mo
2020-02-21 00:22:06
原创 Best Time to Buy and Sell Stock
Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted
2020-02-21 00:22:06
原创 Add Digits
Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: G
2020-02-21 00:22:06
原创 Plus One
Given a non-negative integer represented as a non-empty array of digits, plus one to the integer. You may assume th
2020-02-21 00:22:06
原创 K-diff Pairs in an Array
Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here
2020-02-21 00:22:06
原创 Reverse String II
Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from t
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