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Double pointer Double pointer is an idea or a skill, not a specific algorithm. Specifically, we use two variables to dynamically store two nodes to facilitate some operations. Usually used in linear data structures. Especially for the problems of linked list, it is often necessary to use two or more pointers to memorize the nodes on the linke ...

Give you an integer array numbers with subscript starting from 1. The array has been arranged in non decreasing order. Please find two numbers in the array that meet the sum of addition and equal to the target number target. If the two numbers are numbers[index1] and numbers[index2] respectively, then 1 < = index1 < index2 < = numbers ...

Game link 2022 Niuke winter vacation algorithm basic training camp 3 1. Zhinai's password Title Description Zhinai went to register an account. He found that the password of the website must meet the following conditions A password is a string that contains only uppercase and lowercase English letters, numbers, and special symbols. The length ...

Resource constraints Time limit: 1.0s   Memory limit: 256.0MB Given three integer arrays 　　A = [A1, A2, ... AN], 　　B = [B1, B2, ... BN], 　　C = [C1, C2, ... CN]， Please count how many triples (i, j, k) satisfy: 　　1. 1 <= i, j, k <= N 　　2. Ai < Bj < Ck Input format The first line contains an integer N. The second ...

Title Description Give you a string s and flip all the words in the string one by one. A word is a string of non whitespace characters. Use at least one space in s to separate words in the string. Please return a string that flips the word order in s and connects it with a single space. explain: The input string s can contain extra spaces befo ...