03 2020 档案
摘要:Problem : Given two arrays, write a function to compute their intersection. Example 1: Example 2: Note: Each element in the result must be unique. The
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摘要:Problem : Given a string, find the first non repeating character in it and return it's index. If it doesn't exist, return 1. Examples: Note: You may a
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摘要:Problem : Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), ..., (an, bn) which mak
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摘要:Problem : Write a function that takes an unsigned integer and return the number of '1' bits it has (also known as the Hamming weight). Example 1: Exam
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摘要:Problem : Given a column title as appear in an Excel sheet, return its corresponding column number. For example: Example 1: Example 2: Example 3: 思路 :
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摘要:Problem : Given a string, your task is to count how many palindromic substrings in this string. The substrings with different start indexes or end ind
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摘要:Problem : Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element
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摘要:Problem : Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements
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摘要:Problem : Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number mu
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摘要:Problem : Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non zero elements. Exampl
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摘要:Problem : Given a singly linked list, determine if it is a palindrome. Example 1: Example 2: Follow up: Could you do it in O(n) time and O(1) space? 思
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摘要: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 posit
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摘要:Problem : Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice
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摘要:Problem : Given an array of size n, find the majority element. The majority element is the element that appears more than times. You may assume that t
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摘要:Problem : 思路 : Solution (C++) : 性能 : Runtime: 932 ms Memory Usage: 14.8 MB 思路 : Solution (C++) : 性能 : Runtime: ms Memory Usage: MB
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摘要:Problem : Given a sorted linked list, delete all duplicates such that each element appear only once. Example 1: Example 2: 思路 : Solution (C++) : 性能 :
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摘要:Problem : Given two binary strings, return their sum (also a binary string). The input strings are both non empty and contains only characters 1 or 0.
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摘要:Problem : Implement . Compute and return the square root of x, where x is guaranteed to be a non negative integer. Since the return type is an integer
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摘要:Problem : You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways
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摘要:Problem : Given a non empty array of digits representing a non negative integer, plus one to the integer. The digits are stored such that the most sig
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摘要:Problem : Given a string s consists of upper/lower case alphabets and empty space characters ' ', return the length of last word (last word means the
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摘要:Problem : Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inse
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摘要:Problem : Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is va
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摘要:Problem : Given a 32 bit signed integer, reverse digits of an integer. Example 1: Example 2: Example 3: Note: Assume we are dealing with an environmen
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摘要:Problem : There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time com
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摘要:Problem : You are given two non empty linked lists representing two non negative integers. The digits are stored in reverse order and each of their no
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摘要:Problem : Implement strStr(). Return the index of the first occurrence of needle in haystack, or 1 if needle is not part of haystack. Example 1: Examp
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摘要:Problem : Given an array nums and a value val, remove all instances of that value in place and return the new length. Do not allocate extra space for
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摘要:Problem : Given a sorted array nums, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate
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摘要:Problem : Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Example 2: E
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摘要:Problem : Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string
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摘要:Problem : Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists
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摘要:什么是Linux 两层含义: 一种是Linus Benedict Torvalds编写的开源操作系统的内核 另一种是广义的操作系统 执行环境: 云主机 无数据的PC(不推荐多系统混跑) 虚拟机(推荐方式) 版本 内核版本 内核版本分为三个部分:主版本号、次版本号、末版本号;次版本号是奇数为开发版,偶
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