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[树的直径]F. Three Paths on a Tree
F. Three Paths on a Tree Description You are given an unweighted tree with nn vertices. Recall that a tree is a connected undirected graph without cyc ...
分类:其他好文   时间:2020-02-13 09:54:10    阅读次数:72
PTA 1001 A+B Format
问题描述: Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are le ...
分类:其他好文   时间:2020-02-12 10:51:16    阅读次数:65
cf584DDima and Lisa(素数性质,三素数,哥德巴赫猜想)
题目链接 Dima loves representing an odd number as the sum of multiple primes, and Lisa loves it when there are at most three primes. Help them to represen ...
分类:其他好文   时间:2020-02-12 00:29:05    阅读次数:85
A1001A+Bforamt
Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less tha ...
分类:其他好文   时间:2020-02-11 19:26:40    阅读次数:79
树的直径| CF#615Div3 F. Three Paths on a Tree
F. Three Paths on a Tree 思路 两种方法: 1.两次bfs求树的直径,顺便求出一个直径端点到所有点的最短距离;再bfs一次,求另一个直径上的端点到其它所有点的最短距离;之后枚举第三个端点(不等于端点1和端点2),dis(a,b) + dis(b,c) + dis(a,c) 再 ...
分类:其他好文   时间:2020-02-11 12:01:45    阅读次数:53
PAT 甲级 1065.A+B and C C++/Java
题目来源 Given three integers A, B and C in [?], you are supposed to tell whether A+B>C. Input Specification: The first line of the input gives the positi ...
分类:编程语言   时间:2020-02-05 21:51:51    阅读次数:72
强大的 Python 任务自动化工具!invoke 十分钟入门指南
接着前面的《 "tox 教程" 》,以及刚翻译好的《 "nox文档" 》,我们继续聊聊 Python 任务自动化的话题。 nox 的作者在去年的 Pycon US 上,做了一场题为《 "Break the Cycle: Three excellent Python tools to automate ...
分类:编程语言   时间:2020-02-05 20:25:24    阅读次数:99
PP: Imaging time-series to improve classification and imputation
From: University of Maryland encode time series as different types of images. reformulate features of time series as visual clues. three representatio ...
分类:其他好文   时间:2020-02-05 10:00:43    阅读次数:79
551. Student Attendance Record I
You are given a string representing an attendance record for a student. The record only contains the following three characters: 'A' : Absent. 'L' : L ...
分类:其他好文   时间:2020-02-05 09:48:50    阅读次数:45
Codeforces Round #615 (Div. 3) F. Three Paths on a Tree
F. Three Paths on a Tree 原题链接:https://codeforces.com/contest/1294/problem/F 题目大意: 给定一棵树,选出三点,使三点连成的j简单路径最大。简而言之,三个点连成的边的集合大小。 解题思路: 假设任取一点为三点连线的公共点,最长 ...
分类:其他好文   时间:2020-02-03 15:25:01    阅读次数:66
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