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Prepare for the second test, three questions a day Topic 1: delete nodes in the linked list Please write a function to delete a specific node in the single linked list. When designing the function, you should pay attention to that you cannot access the head node of the linked list. You can only directly access the node to be deleted. The top ...

C + + & Python description LeetCode 1 Sum of two numbers    Hello, I'm q í gu ā n ji e, sharing some technical posts in the official account, CSDN, GitHub, B station, HUAWEI Developer Forum and so on. It's not hard to give up, but persistence must be cool! Time flies, the future can be expected, come on~ If you love b ...

Look at leetcode Given an array containing n positive integers and a positive integer target. Find out the continuous sub array [numsl, numsl+1,..., numsr-1, numsr] with the smallest length satisfying its sum ≥ target in the array, and return its length. If there is no eligible subarray, 0 is returned. Example 1: Input: target = 7, Num ...

When the uppercase and lowercase forms of each letter contained in a string s ， appear in s ， at the same time, the string s ， is called a beautiful string. For example, "abABB" is a beautiful string, because 'a' and 'a' appear at the same time, and 'B' and 'B' appear at the same time. However, "abA" is not a good string ...

5 (optional) gene splicing (100 points) Gene splicing is the joining of different DNA fragments. The existing n DNA fragments line up from left to right. Each time two adjacent DNA fragments were selected and stitched into a longer DNA fragment. The last DNA fragment was adjacent to the first. Repeat this process until all the DNA fragments for ...

There are many binary search questions in leecode. Generally speaking, when a topic has the following characteristics, you should immediately associate it with the possibility of using binary search: The array to be searched is ordered or partially orderedThe time complexity is required to be lower than O(n), or the time complexity is directly ...

Day 19 884 unusual words in two sentences A sentence is a string of words separated by spaces. Each word consists of only lowercase letters. If a word happens to appear once in one sentence but does not appear in the other sentence, the word is not common. Give you two sentences s1 and s2 and return a list of all the infrequently used words ...

⭐ New pit in winter vacation -- daily question notes of code Fox 5993. Multiply the value found by 2-week question 1 Give you an integer array nums, and give you an integer original, which is the first number to search in nums. Next, you need to follow the following steps: If the original is found in nums, multiply the original by 2 to g ...

344,Reverse string Write a function that inverts the input string. The input string is given as a character array s. Do not allocate additional space to another array. You must modify the input array in place and use the additional space of O(1) to solve this problem.   class Solution { public void reverseString(char[] s) { ...

Sum of K numbers Title Description: give you an array composed of any N numbers. Given a target value target, it is required to find K numbers so that the sum of these K numbers is target. It is required to output the combination of all k digits that meet this condition, and the combination shall not be repeated (take K=4 as an example) I ...