Programmer Think

Rogue: Monkey A very disgusting question. The meaning of the question cards you first, making you feel that it gives the structure of a tree (one monkey with two hands) But in reverse, the monkey's hand is a directed edge, and there are double edges or self rings in the graph A monkey's hand is not holding the other monkey's hand (release ...

Differential constraint Problem type description given n n n variables and m m m constraints, e.g x ...

Solving athletes' matching problem by backtracking method abstract Aiming at the problem of the best matching of athletes, this paper uses the backtracking method to find the optimal solution of competition advantage score, and studies the best matching method of male and female athletes, so as to maximize the sum of competition advantages of ...

Topological sorting of hand-in-hand Teaching In graph theory, * * Topological Sorting Is a linear sequence of all vertices of a directed acyclic graph (DAG) * *. And the sequence must meet the following two conditions: Each vertex appears only once.If there is A path from vertex A to vertex B, vertex A appears in front of vertex B in the ...

Title address: https://www.acwing.com/problem/content/description/4231/ In a 3 × 3 3×3 three × In the grid of 3, 1 ∼ 8 ...

Depth First Search (DFS) is one of the most common graph searches. Depth First Search continues along a path and returns to the node just accessed when it is unable to search. The feature of depth first is that for the later accessed node, its lead node is accessed first. According to the characteristics of depth first traversal: latecomers ser ...

Network flow - bipartite graph matching - pilot pairing scheme problem - network flow question 24 - Luogu P2756 Title Description There are n pilots in total, including M foreign pilots and (n - m) British pilots. Foreign pilots are numbered from 1 to m and British pilots are numbered from m + 1 to n. For a given cooperation between foreign p ...

As the head of a city's emergency rescue team, you have a special national map. The map shows multiple scattered cities and some expressways connecting cities. The number of rescue teams in each city and the length of each expressway connecting the two cities are marked on the map. When other cities have emergency calls for you, your task is to ...

Given undirected connected graph: For one thing u u u. If deleted from the figure u u u and all u ...

B3609 [graph theory and algebraic structure 701] strongly connected components Some concepts: If any two nodes in a directed graph x , y x,y x. Y, existence ...