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Yan's dp analysis Learn the algorithm on AcWing, y is always strong! ha-ha When using this method to solve the dp problem, the introduction is clear, that is, thinking about the dp problem from the perspective of set. The following is an example of the 01 knapsack problem When thinking about a DP problem, we can think about the problem f ...

1039: repeat subsequence problem Title Description PIPI has two strings a and B. please find out how many times the string a is repeated at least to make B a subsequence of A. We call x a subsequence of Y if and only if several characters can be deleted from Y to get X. For example, for A = "abb" and B="bbaa", A repeats ...

Basic concepts Edit distance issue: It is difficult to edit the distance problem, but the solution is very beautiful, and it is also a rare practical algorithmEdit the distance usage scenario: For revising the misplaced content of the article The article can only be modified by 20 words, and supports adding, deleting and replacing oper ...

⭐ New pit in winter vacation -- daily question notes of code Fox 1220. Count the number of vowel sequences - Hard Title Description: Give you an integer n, please help us count how many strings with length n can be formed according to the following rules: Each character in the string should be a lowercase vowel ('a ',' e ',' I ',' o ',' ...

Word splitting Title Description: given a non empty string s and a list wordDict containing non empty words, determine whether s can be divided into one or more words in the dictionary by spaces. explain: Words in the dictionary can be reused when splitting. You can assume that there are no duplicate words in the dictionary. See LeetCode's o ...

Title Source: Blue Bridge Cup-2017 Xiao Ming eats breakfast at a bun shop almost every morning. This bun is paved with N kinds of steaming cages, of which the second type just fits Ai buns Each type of steamer has many cages, which can be considered infinite. Whenever a customer wants to buy X buns, the uncle sells buns and chooses sever ...

preface Review the content of the basic course of acwing algorithm. This article is to explain the basic algorithm: dynamic programming - digital statistics DP. About time complexity: bloggers are not very good at computing at present. They will make up for it in the future. 1, Dynamic programming Dynamic Programming (DP) is the proc ...

Star collision Given an integer array astroids, the planets in the same row are represented. For each element in the array, its absolute value represents the size of the planet, and positive and negative represents the moving direction of the planet (positive represents moving to the right, negative represents moving to the left). Each planet m ...

preface I've been dragged to the bride in the last two days and haven't done anything. So let's start with a few simple questions to find self-confidence (dog head) subject Arithmetic square Give you a nonnegative integer x, calculate and return the arithmetic square root of X. Since the return type is an integer, only the integer ...

9.3 multistage decision making problem This chapter looks at the problem first. 9.3.1 shortest path of multi segment diagram 9-4 unidirectional TSP (UVA 116) For an integer matrix with M rows and N columns (m < = 10, n < = 100, the data range here is to remind you that this is a matrix whose width may be much greater than its length ...