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CF1103C Johnny Solving 题解

首先考虑建出 dfs 树，如果一个点的深度 \(\geq \frac{n}{k}\)，那么直接输出这个点到根的路径即可。如果没有点深度 \(\geq \frac{n}{k}\)，可以证明这棵树一定有不少于 \(k\) 个叶子（考虑反证法，如果叶子个数少于 \(k\)，那么点数最多也不到 \(k\cdot \frac{n}{k}=n\) 不可能）。由于每个点

耗时两日，安装fbprophet

Facebook的开源时序分析库fbprophet号称史上最难安装的库，实测确实如此。百度了各种简单粗暴或者详细的安装步骤，期间遭遇了各种各样奇怪的问题，现简录如下： 1.已经安装了pystan的前提下，用conda install -c conda-forge install fbprophet， (base) C:\WINDOWS\system32>conda instal

icepak introduction

8:30 – 9:00 Lecture 1 – Introduction and Icepak Overview9:00 – 10:00 Lecture 2 – Interface and Modeling Basics10:00 – 11:00 Lecture 3 – Model Building using Icepak Primitives – Part 111:00 – 12:00 Workshop 1 – Model Building using Icepak Primitives1:

GRYZ20211104 Simulation problem solving report

目录T1 bookT2 programT3 maze Because my English is la, let me try to use English to write this report. Expect to score：\(100+100+0 \sim 50 = 200 \sim 250pts\) The actual score：\(100+100+25 = 225pts\) In front of the report, worship @斜揽残箫 Yeah, how a

CF1103C Johnny Solving（构造题）

洛谷传送门解题思路在图上很难做这种构造题，所以一种常用的方法是求出其生成树。在生成树上做就容易很多。于是这个题就按照 dfs 序建立一颗生成树，记录下每个节点的返祖边。于是第一问可以根据树的深度判断是否符合要求，符合的话直接输出。若没有，则易证第二问一定成立：因为第

Python import caffe | 使用 Anaconda安装caffe | ModuleNotFoundError: No module named ‘caffe‘ | 简记

Wavebee SDK solving compatibility problem with ubuntu20

Wavebee SDK was designed for ubuntu16, not compatible with Ubuntu 20. Solution: install libssl1.0-dev link: https://www.garron.me/en/linux/install-ruby-2-3-3-ubuntu.html Edit this file /etc/apt/sources.list and add this line to the end of it. deb http://s

ubuntu下使用conda出现solving environment失败

更换anaconda的源（注意是anaconda的源，不是ubuntu的源） sudo gedit ./.condarc 在出现的空文档中写入 channels: - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free - https://mirrors.tuna.tsingh

OS L3-10: Solving Problems with Monitors

成功解决Solving environment: failed with initial frozen solve. Retrying with flexible solve.

成功解决Solving environment: failed with initial frozen solve. Retrying with flexible solve. 目录解决问题解决思路解决方法安装过程…… 解决问题 Solving environment: failed with initial frozen solve. Retrying with flexible solv

《每日论文》Problem Solving with Algorithms and Data Structures using Python.（第四章）

Problem Solving with Algorithms and Data Structures using Python.使用Python解决算法和数据结构的问题。 By Brad Miller and David Ranum, Luther College 目录： Problem Solving with Algorithms and Data Structures using Python.使用Python解决算法和数据结构的问

Solver 变量和函数

类型变量名初始化功能 int incremental static BoolOption opt_incremental(_cat, "incremental", "Use incremental SAT solving", false); incremental(opt_incremental) Use incremental SAT solving vec<lbool> model vec() : data(

Solving environment: failed with repodata from current_repodata.json, will retry with next repodata

1.conda下载PIL出错： Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source. Collecting package metadata (repodata.json): failed 2.PIL 全称 Python Image Library。换成如下命令： conda install Pillow

B - Solving Order HDU - 5702

#include<stdio.h> #include<string.h> #include<stdlib.h> #include<math.h> #include<cmath> #include<complex> #include<string> #include<algorithm> #include<iostream> using namespace std; const int M = 15;

Solving Linear Equation

1. Gauss Elimination Method \((1\times 1)\) \(ax_1=b\) \(\rightarrow\) \(x_1=\frac{b}{a}\) \((2 \times 2)\) \(\begin{cases}a_{11}x_1+a_{12}x_2=b_1 \\ a_{21}x_1+a_{22}x_2=b_2\end{cases}\) Ex1: \[ \begin{cases}x_1+2x_2=5 \\ 3x_1+4x_2

Johnny Solving CodeForces - 1103C (构造,图论)

大意: 无向图, 无重边自环, 每个点度数>=3, 要求完成下面任意一个任务找一条结点数不少于n/k的简单路径找k个简单环, 每个环结点数小于n/k, 且不为3的倍数, 且每个环有一个特殊点$x$, $x$只属于这一个环任选一棵生成树, 若高度>=n/k, 直接完成任务1, 否则对于叶子数一定

输入conda指令出现solving environment： failed

在cmd指令下或者power shell下输入一些conda指令都会出现Solving environment: failed，如下更新conda：conda update -n base conda 输入conda install也是，请问这要怎么办啊？蟹蟹~