In the mathematical discipline of graph theory, the line graph of a simple undirected weighted graph GG is another simple undirected weighted graph L(G)L(G) that represents the adjacency between every two edges in GG. Precisely speaking, for an un
R语言Apriori算法 **项目要求：**Project Start**规则生成和可视化** 我们需要安装arules and arulesViz包。 项目要求： 生成频繁项目集满足下面条件： – The minimum support threshold as 0.02 – The minimum length of the itemsets as 1 – The maximum length of the
In a country popular for train travel, you have planned some train travelling one year in advance. The days of the year that you will travel is given as an array days. Each day is an integer from 1 to 365. Train tickets are sold in 3 different ways:
\begin{tikzpicture} \node[draw,minimum width=40mm, minimum height=6mm] (m1) {message}; \node[draw,minimum width=10mm, minimum height=6mm, left =(0mm of m1.east)] (m2) {0}; \node[draw, minimum width=30mm, minimum height=6mm, below of = m1, node
problem 1403. Minimum Subsequence in Non-Increasing Order 题意 重在理解题意，找出这样的最小子序列，肯定从数组中最大数开始一个一个提取，直到子序列的和大于剩余在原数组的元素之和。关键在于怎么提取数组中的最大数。可以排序，或者使用数值的数量。也就是说，第一步先排序，第二步
算法编程Algos Programming 不同算法的集合，用于编程比赛，如ACM ICPC。 算法按主题划分。大多数算法都可以从文件中按原样运行。每种算法都有一个参考问题，并对其时间和空间复杂度作了一些说明。 参考：https://github.com/ADJA/algos 算法列表List of alg
package LeetCode_1658 /** * 1658. Minimum Operations to Reduce X to Zero * https://leetcode.com/problems/minimum-operations-to-reduce-x-to-zero/ * You are given an integer array nums and an integer x. * In one operation, you can either remove the lef
A tree is an undirected graph in which any two vertices are connected by exactly one path. In other words, any connected graph without simple cycles is a tree. Given a tree of n nodes labelled from 0 to n - 1, and an array of n - 1 edges where edg
Given a set of points in the xy-plane, determine the minimum area of a rectangle formed from these points, with sides parallel to the x and y axes. If there isn't any rectangle, return 0. Example 1: Input: [[1,1],[1,3],[3,1],[3,3],[2,2]] Output: 4
题目 Minimum Path Sum 解题方法 这是一道动态规划题，与Unique Paths类似，区别在于此题要选择每个格点上方和左方中的最小值与该格点的值相加，作为到达该格点所需要的最小值，循环做到终点就可以得到最终答案。 代码 class Solution: def minPathSum(self, grid: List[List[int]]
Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Input: 1 \ 3 / 2 Output: 1 Explanation: The minimum absolute difference is 1, which is the differen
https://codeforces.com/contest/1409/problem/B 可以考虑先让a最小，再让b最小，最后取最小值。这个题很简单，可能是思维局限了。 #include<bits/stdc++.h> using namespace std; const int N=1e6+5; #define ll long long int main(){ int t;cin>>t; while(t--){
题目 Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K different kinds
问题： 给出一组坐标点，飞机按照顺序，以坐标点为目标进行飞行， 移动一个单位（水平，垂直，对角线），花费 1 秒钟。 求总共花费时间。 Example 1: Input: points = [[1,1],[3,4],[-1,0]] Output: 7 Explanation: One optimal path is [1,1] -> [2,2] -> [3,3] -> [3,4] -> [2,3] -> [1,2] -> [0
Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two time points in the list. Example 1: Input: ["23:59","00:00"] Output: 1 Note: The number of time points
题目链接 http://codeforces.com/contest/1334/problem/D tag 构造，模拟 solution 题目要求出在有向完全图中找到一个遍历所有边所经过点编号字典序最小的环的第\(L-R\)位，字典序最小，容易想到贪心的构造，每次出边都选择未访问过的编号最小的点，又要构成环，因而最后一个访问的点是1，例\(n
问题： 给定n个汽车站之间的距离数组distances（相邻两个站相连，收尾站相连，可顺时针逆时针两个方向行驶） 求start站和destination站之间的最短距离。 Example 1: Input: distance = [1,2,3,4], start = 0, destination = 1 Output: 1 Explanation: Distance between 0 and 1 is 1 or 9,
Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Input: 1 \ 3 / 2 Output: 1 Explanation: The minimum absolute difference is 1, which is the differenc
题目描述如下： 动态规划的解法：1.状态的定义2.状态转换方程3.初始值4.返回值 就本题而言：grid[][]为原数组```1.状态的定义 F[i][j]表示从F[0][0]到该位置所经历的最小路径和2.状态转换方程 F[i][j]=min(F[i][j-1],F[i-1][j])+grid[i][j]3.初始值 F[0][0]=grid[0][0]4.返回值 F[m
leetcode 64. Minimum Path Sum Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. Note: You can only move either down or right at any point in time. Example:
Hdu-5723 An abandoned country has n(n≤100000) villages which are numbered from 1 to n. Since abandoned for a long time, the roads need to be re-built. There are m(m≤1000000) roads to be re-built, the length of each road is wi(wi≤1000000). Guaranteed that
题目链接：Codeforces - Minimum Diameter Tree 我们把权值均分给叶子附近的边权即可。为什么正确呢？ 假设我们把某一靠近叶子的边权分给其他靠近叶子的，肯定增大。 如果分给非叶子的边，那么其他叶子之间通过这条边肯定也增大。 AC代码： #pragma GCC optimize("-Ofast","-funrol
题目链接：https://vjudge.net/problem/POJ-2516 思路：对于每种商品跑最小费用最大流，如果所有商品和人一起建图跑，O（v^2*m）数量级太大，会超时。 把店里的商品拆点，入和出之间是商品库存量，起到限流作用。 源点->人对该商品的需求->库存点入->库存点出->汇点 源点与人之间的边的流为人的需求
原题：https://vjudge.net/problem/UVA-10791 基本思路：1、借助唯一分解定理分解数据。2、求和输出 知识点：1、筛法得素数 2、唯一分解定理模板代码 3、数论分析-唯一分解定理的性质 唯一分解定理：该定理通过素数将任意一个大于2的n分解为 最小质数因子的幂 的乘积。这是一个数字简化的
题目地址： https://leetcode.com/problems/minimum-path-sum/ 给定一个矩阵，求从左上到右下所有路径中和最小的那条路径的和。每步只能向右或者向下走。动态规划。设f[i][j]f[i][j]f[i][j]表示从grid[0][0]grid[0][0]grid[0][0]到grid[i][j]grid[i][j]grid[i][j]的所有路径中，
