随笔分类 - Hash
摘要：［抄题］： Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters
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摘要：［抄题］： Given a string, determine if a permutation of the string could form a palindrome. For example,"code" -> False, "aab" -> True, "carerac" -> True.
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摘要：［抄题］： Given n points in the plane that are all pairwise distinct, a "boomerang" is a tuple of points (i, j, k) such that the distance between i and j
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摘要：［抄题］： You are given a data structure of employee information, which includes the employee's unique id, his importance value and his directsubordinates
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摘要：［抄题］： Given an integer array with even length, where different numbers in this array represent different kinds of candies. Each number means one candy
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摘要：［抄题］： Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more lett
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摘要：［抄题］： Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a
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摘要：［抄题］： Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occ
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摘要：［抄题］： Given two lists Aand B, and B is an anagram of A. B is an anagram of A means B is made by randomizing the order of the elements in A. We want to
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摘要：［抄题］： 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
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摘要：［抄题］： You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in Sis a type of
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摘要：原版 sorted ［抄题］： ［思维问题］： 存sum - nums[i]（补集），若出现第二次则调出 ［一句话思路］： hashmap中，重要的数值当做key，角标当做value. ［画图］： ［一刷］： ［总结］： ［复杂度］：n/n ［英文数据结构，为什么不用别的数据结构］： 2根指针 n^
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