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  • A summary: how to use bit manipulation to solve problems easily and efficiently

    Wiki Bit manipulation is the act of algorithmically manipulating bits or other pieces o...

  • QuickSort 快排知識要點(diǎn)及一些改進(jìn)

    概念 什么是快排? 快速排序由C. A. R. Hoare在1962年提出纳击。它的基本思想是:通過一趟排序?qū)⒁判虻臄?shù)據(jù)分割成獨(dú)立的兩部分续扔,其中一部分的所有數(shù)據(jù)都比另外一部分的...

  • 149. Max Points on a Line

    Given n points on a 2D plane, find the maximum number of points that lie on the same st...

  • 202. Happy Number

    Write an algorithm to determine if a number is "happy".A happy number is a number defin...

  • Contains Duplicates I,II,III.

    Three similar questions. Given an array of integers, find if the array contains any dup...

  • 340. Longest Substring with At Most K Distinct Characters

    Given a string, find the length of the longest substring T that contains at most k dist...

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