Jianchao's Blog

摘要： This problem can be solved easily once you find the regularities :-) This link has done it for you. You may refer to its Python version. I rewrite it ... 阅读全文

摘要： Problem Description:Given an array of meeting time intervals consisting of start and end times[[s1,e1],[s2,e2],...](si& intervals) { 4 sort(in... 阅读全文

摘要： Problem Description: Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] (si < ei), determine if a person 阅读全文

摘要： Problem Description:A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down).Write a function to dete... 阅读全文

摘要： Problem Description:This is afollow upofShortest Word Distance. The only difference is now you are given the list of words and your method will be cal... 阅读全文

摘要： Problem Description:Given a list of words and two wordsword1andword2, return the shortest distance between these two words in the list.For example,Ass... 阅读全文

摘要： Problem Description: Implement an iterator to flatten a 2d vector.For example,Given 2d vector =[ [1,2], [3], [4,5,6]]By callingnextrepeatedly unti... 阅读全文

摘要： A relatively difficult tree problem. Well, a recursive solution still gives clean codes. The tricky part of this problem is how to record the result. ... 阅读全文

摘要： An extension of Best Time to Buy and Sell Stock III. The idea is still to use dynamic programming (see here for detailed introduction). However, in th... 阅读全文

摘要： Personally, this is a relatively difficult DP problem. This link posts a typical DP solution to it. You may need some time to get how it works.The cod... 阅读全文

摘要： The function signature has been updated to return a more intuitivevector>which treats a single string as a group of anagrams consisting of only itself... 阅读全文

摘要： Hash TableThis idea uses a hash table to record the times of appearances of each letter in the two stringssandt. For each letter ins, it increases the... 阅读全文

摘要： To solve this problem, you first need to understand it well. The key problem is tell the difference of scramble from permutations. You may refer to th... 阅读全文

摘要： Well, this problem seems to be a little tricky at first glance. However, the idea (taken from this link) is really simple. Let's take the equation 2*3... 阅读全文

摘要： Well, you may need to run some examples to have the intuition for the answer since we only require children with higher rating get more candies than t... 阅读全文