076 Minimum Window Substring

Source: Internet
Author: User

076 Minimum Window Substring

The problem is to use a dictionary to keep track of how many letters you need to match and the number of times you need to match now. Then use a queue to record which subtitles were match and the order in which they were match

 fromCollectionsImportdefaultdictclassSolution:#@param {string} s    #@param {string} t    #@return {string}    defMinwindow (self, S, T): DiC=defaultdict (int) forCinchlist (t): Dic[c]+ = 1length, tmp, ans= Len (t), [], S +"X"         forIinchRange (0, Len (s)): C=S[i]ifCinchdic:tmp.append (i) dic[c]-= 1ifDIC[C] >=0:length-= 1ifLength = =0: whileTMP! =[]: K=S[tmp[0]]ifDIC[K] <0:dic[k]+ = 1tmp.pop (0)Else:                         Break                ifI-tmp[0] <len (ans): ans= S[tmp[0]:i+1] K=S[tmp[0]] dic[k]+ = 1tmp.pop (0) length+ = 1ifAns = = s +"X":            return ""        returnAns

076 Minimum Window Substring

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