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poj 1741
题面: Tree Give a tree with n vertices,each edge has a length(positive integer less than 1001). Define dist(u,v)=The min distance between node u and v. ...
分类:其他好文   时间:2018-10-22 20:18:37    阅读次数:175
矩阵半正定: positive semidefinite
具体定义:https://en.wikipedia.org/wiki/Positive-definite_matrix ...
分类:其他好文   时间:2018-10-20 22:44:58    阅读次数:213
CodeForces D. Concatenated Multiples
http://codeforces.com/contest/1029/problem/D You are given an array aa, consisting of nn positive integers. Let's call a concatenation of numbers xx a ...
分类:其他好文   时间:2018-10-20 21:03:51    阅读次数:212
题解:CERC2015 ASCII Addition
庆祝通过noip2018初赛,系列五题EP5. 题目描述: 题意翻译 题目背景 现在,如果你只是用手机的相机对着它们,智能手机应用可以即时翻译文本,甚至解决数学问题。您的工作是实现一个更简单的功能,回忆过去——添加两个作为ASCII艺术的整数。 题目描述 ASCII艺术是一个字符矩阵,正好是7行高, ...
分类:其他好文   时间:2018-10-20 19:50:14    阅读次数:189
59. Spiral Matrix II
Given a positive integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. Example: AC code: Runtime: 0 ms, faster than 1 ...
分类:其他好文   时间:2018-10-19 21:53:27    阅读次数:104
UVA1626-Brackets sequence(动态规划基础)
Problem UVA1626-Brackets sequence Time Limit: 4500 mSec Problem Description Input The input begins with a single positive integer on a line by itself ...
分类:其他好文   时间:2018-10-19 02:25:06    阅读次数:103
分类问题的几个评价指标(Precision、Recall、F1-Score、Micro-F1、Macro-F1
轉自 https://blog.csdn.net/sinat_28576553/article/details/80258619 四个基本概念TP、True Positive 真阳性:预测为正,实际也为正 FP、False Positive 假阳性:预测为正,实际为负 FN、False Negati ...
分类:系统相关   时间:2018-10-19 00:00:25    阅读次数:930
POJ 1741 Tree [点分治]
题目传送门 Tree Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 30475 Accepted: 10232 Description Give a tree with n vertices,each edge has a le ...
分类:其他好文   时间:2018-10-18 01:04:20    阅读次数:170
idea正则表达式查找代码的方法
find: 该正则表达式: initEcharts *:{1} *\{{1} 匹配: Summary of regular-expression constructsConstructMatches CharactersxThe character x\\The backslash characte ...
分类:其他好文   时间:2018-10-17 12:16:55    阅读次数:923
HDU - 5936: Difference(中途相遇法)
Little Ruins is playing a number game, first he chooses two positive integers yy and KK and calculates f(y,K)f(y,K), here f(y,K)=∑z in every digits of ...
分类:其他好文   时间:2018-10-17 00:21:39    阅读次数:237
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