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Find the CelebritySuppose you are at a party withnpeople (labeled from0ton - 1) and among them, there may exist one celebrity. The definition of a cel... 阅读全文
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Longest Substring with At Most Two Distinct CharactersGiven a string, find the length of the longest substring T that contains at most 2 distinct char... 阅读全文
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Read N Characters Given Read4The API:int read4(char *buf)reads 4 characters at a time from a file.The return value is the actual number of characters ... 阅读全文
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Meeting RoomsGiven an array of meeting time intervals consisting of start and end times[[s1,e1],[s2,e2],...](si& intervals) {13 sort(intervals... 阅读全文
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Graph Valid TreeGivennnodes labeled from0ton - 1and a list of undirected edges (each edge is a pair of nodes), write a function to check whether these... 阅读全文
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Palindrome PermutationGiven a string, determine if a permutation of the string could form a palindrome.For example,"code"-> False,"aab"-> True,"carera... 阅读全文
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Encode and Decode StringsDesign an algorithm to encodea list of stringstoa string. The encoded string is then sent over the network and is decoded bac... 阅读全文
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Paint FenceThere is a fence with n posts, each post can be painted with one of the k colors.You have to paint all the posts such that no more than two... 阅读全文
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Paint HouseThere are a row ofnhouses, each house can be painted with one of the three colors: red, blue or green. The cost of painting each house with... 阅读全文
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Shortest Word DistanceGiven a list of words and two wordsword1andword2, return the shortest distance between these two words in the list.For example,A... 阅读全文