1 图论概述 1.1 发展历史 第一阶段: 1736:欧拉发表首篇关于图论的文章,研究了哥尼斯堡七桥问题,被称为图论之父 1750:提出了拓扑学的第一个定理,多面体欧拉公式:V-E+F=2 第二阶段(19~20世纪): 1852: Francis Guthrie提出四色问题 1856: Thomas P. Kirkman & William R.Hamilton研究了哈密尔顿图 1878: Alfred Kempe给出给出四色定理证明 1890: 希伍德(Heawood)推翻原有四色定理证明 1

import os,os.path def func(arg,dirname,names): for filespath in names: print os.path.join(dirname,filespath) if __name__=="__main__": print "==========os.walk================" index = 1 for root,subdirs,files in os.walk("c:\\test&

B. A Walk Through the Forest Time Limit: 1000ms Memory Limit: 32768KB 64-bit integer IO format: %I64d      Java class name: Main   Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax af

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4603    Accepted Submission(s): 1671 Problem DescriptionJimmy experiences a lot of stress at work these days, especially

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5679    Accepted Submission(s): 2086 Problem Description Jimmy experiences a lot of stress at work these days, especiall

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4383    Accepted Submission(s): 1573 Problem Description Jimmy experiences a lot of stress at work these days, especiall

A Walk Through the Forest Time Limit:1000MS  Memory Limit:65536K Total Submit:48 Accepted:15 Description Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax after a hard day, he likes t

A Walk Through the Forest Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 3   Accepted Submission(s) : 1 Problem Description Jimmy experiences a lot of stress at work these days, especially since

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 9081 Accepted Submission(s): 3353 Problem Description Jimmy experiences a lot of stress at work these days, especially sin

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 118 Accepted Submission(s): 57   Problem Description Jimmy experiences a lot of stress at work these days, especially sinc

Problem    UVA - 10917 - Walk Through the Forest Time Limit: 3000 mSec Problem Description Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax after a hard day, he likes to walk home. To

python中os.walk是一个简单易用的文件.目录遍历器,可以帮助我们高效的处理文件.目录方面的事情. 1.载入 要使用os.walk,首先要载入该函数 可以使用以下两种方法 import os from os import walk 2.使用 os.walk的函数声明为: walk(top, topdown=True, onerror=None, followlinks=False) 参数 top 是你所要便利的目录的地址 topdown 为真,则优先遍历top目录,否则优先遍历top的子

path包的使用 package main; import ( "fmt" "path" ) //go语言path包的学习 func main() { //返回路径的最后一个元素 fmt.Println(path.Base("./a/b/c")); //如果路径为空字符串,返回. fmt.Println(path.Base("")); //如果路径只有斜线,返回/ fmt.Println(path.Base("///

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10172    Accepted Submission(s): 3701 Problem Description Jimmy experiences a lot of stress at work these days, especial

Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax after a hard day, he likes to walk home. To make things even nicer, his office is on one side of a forest, and his house is on the ot

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5306    Accepted Submission(s): 1939 Problem Description Jimmy experiences a lot of stress at work these days, especiall

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7733    Accepted Submission(s): 2851 Problem Description Jimmy experiences a lot of stress at work these days, especiall

题目链接:acm.hdu.edu.cn/showproblem.php?pid=1142 Problem Description Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax after a hard day, he likes to walk home. To make things even nicer,

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 8850    Accepted Submission(s): 3267 Problem Description Jimmy experiences a lot of stress at work these days, especiall

path包的使用 package main; import ( "fmt" "path" ) //go语言path包的学习 func main() { //返回路径的最后一个元素 fmt.Println(path.Base("./a/b/c")); //如果路径为空字符串,返回. fmt.Println(path.Base("")); //如果路径只有斜线,返回/ fmt.Println(path.Base("///