骰子拼字


骰子拼字
字母骰子,六面字母有可能重复,给15个,input是长15的string,给出一个可行解使筛子的排列有可能组成这个15长度的单词。 

follow up是如果有可互换的字母怎么判断,比如W可看成M,Z可能看成N等等

https://www.1point3acres.com/bbs ... read&tid=488082


比如骰子 = [a, b], [c, c]

所以
"ab" [no]
"ac" [yes]
"bc" [yes]
"bb" [no]
"cc" [no]

差不多意思就是每个character从一个骰子上来, 怎么组合.

dfs吧, 没什么难度.


再加一个例子吧:

骰子 = [a, b], [c, c], [a, a]要求组成abc。则必须第一个骰子b,第二个c,第三个a。

这个问题,其实答到深搜就好了,但是更好的算法可以答匈牙利算法或者KM算法,但是估计不会让现场写的。。。

我觉得V应该就是骰子的数量或者word长度。
二向图一边是字母,另一边是骰子,如果字母在骰子里,就连一下。

补充内容 (2019-3-24 02:49):
二分图,不是二向图
现在都已经考二分图匹配这么难的题了吗.....

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