zzyy17的专栏

Problem:Sort a linked list using insertion sort.A graphical example of insertion sort. The partial sorted list (black) initially contains only the first element in the list.With each iteration ...

Problem:Given an array of citations (each citation is a non-negative integer) of a researcher, write a function to compute the researcher's h-index.According to thedefinition of h-index on Wikip...

Problem:Given two stringssandt, determine if they are isomorphic.Two strings are isomorphic if the characters inscan be replaced to gett.All occurrences of a character must be replaced wi...

Problem:Given two stringssandt, write a function to determine iftis an anagram ofs.Example 1:Input: s = "anagram", t = "nagaram"Output: trueExample 2:Input: s = "rat", t = "car"...

Problem:Count the number of prime numbers less than a non-negative number,n.Example:Input: 10Output: 4Explanation: There are 4 prime numbers less than 10, they are 2, 3, 5, 7.Analysis:...

Problem:Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of th...

Problem:All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the ...

Problem：Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.If the fractional part is repeating, enclose the repeating part in parent...

Problem:Givennpoints on a 2D plane, find the maximum number of points that lie on the same straight line.Example 1:Input: [[1,1],[2,2],[3,3]]Output: 3Explanation:^|| o| o| ...

Problem:A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Return adeep copyof the list.The Linked List is repr...

Problem:Given anon-emptyarray of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it...

Problem:Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).Example:Input: S = "ADOBECODEBANC", T = "ABC"Output: "BANC"...

Problem Description:Given an array of strings, group anagrams together.Example:Input: ["eat", "tea", "tan", "ate", "nat", "bat"],Output:[ ["ate","eat","tea"], ["nat","tan"], ["bat"]]...