#ide：pycharm2019
#python版本：3.7
#作者：eee
#時(shí)間：2020.4.25
#最小長(zhǎng)度電路板排列問(wèn)題

class?Board（）:
????def?Backtrack（selfi）:
????????if?i==self.n:
????????????tmp=self.len（i）
????????????if?tmp????????????????self.bestd=tmp
????????????????for?j?in?range（1self.n+1）:
????????????????????self.bestx[j]=self.x[j]
????????else:
????????????for?j?in?range（iself.n+1）:
????????????????self.x[i]self.x[j]=self.x[j]self.x[i]
????????????????Id=self.len（i）
????????????????if?Id????????????????????self.Backtrack（i+1）
????????????????self.x[i]?self.x[j]?=?self.x[j]?self.x[i]

????def?len（selfii）:
????????for?i?in??range（1self.m+1）:
????????????self.high[i]=0
????????????self.low[i]=self.n+1
????????for?i?in?range（1ii+1）:
????????????for?k?in?range（1self.m+1）:
????????????????if?self.B[self.x[i]][k]==1:
????????????????????if?i????????????????????????self.low[k]=i
????????????????????if?i>self.high[k]:
????????????????????????self.high[k]=i
????????tmp=0
????????for?k?in?range（1self.m+1）:
????????????if（self.low[k]<=self.n?and?self.high[k]>0?and?tmp????????????????tmp=self.high[k]-self.low[k]
????????return?tmp

def?ArrangeBoards（Bnmbestx）:
????X=Board（）
????X.x=[0?for?i?in?range（n+1）]
????X.low=?[0?for?i?in?range（m?+?1）]
????X.high?=?[0?for?i?in?range（m?+?1）]
????X.B=B
????X.n?=?n
????X.m=m
????X.bestx=bestx
????X.bestd=n+1
????for?i?in?range（1n+1）:
????????X.x[i]=i
????X.Backtrack（1）
????return?X.bestd

def?main（）:

????n=8
????m=5
????B=[[NoneNoneNoneNoneNoneNone]
???????[None11111]
???????[None01010]
???????[None01110]
???????[None10110]
???????[None10100]
???????[None11010]
???????[None00001]
???????[None01001]]
????p?=?[0?for?i?in?range（n?+?1）]
????print（ArrangeBoards（Bnmp））
????print（p[1:]）

if?__name__?==?‘__main__‘:
????main（）

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-07-10?17:06??回溯法之最小長(zhǎng)度電路板排列問(wèn)題\
?????文件????????1987??2020-04-27?20:40??回溯法之最小長(zhǎng)度電路板排列問(wèn)題\CircuitBoard.py