Minimum Window Substring

来源：互联网发布：在c语言中初值a 编辑：程序博客网时间：2024/05/04 15:03

转自：

http://www.cnblogs.com/remlostime/archive/2012/11/16/2774077.html

这篇文章的代码是我看到写得最简洁的。

class Solution { private:     int count1[256];     int count2[256]; public:     string minWindow(string S, string T) {         // Start typing your C/C++ solution below         // DO NOT write int main() function         if (T.size() == 0 || S.size() == 0)             return "";                      memset(count1, 0, sizeof(count1));         memset(count2, 0, sizeof(count2));                  for(int i = 0; i < T.size(); i++)         {             count1[T[i]]++;             count2[T[i]]++;         }                  int count = T.size();                  int start = 0;         int minSize = INT_MAX;         int minStart;         for(int end = 0; end < S.size(); end++)         {             if (count2[S[end]] > 0)             {                 count1[S[end]]--;                 if (count1[S[end]] >= 0)                     count--;             }                          if (count == 0)             {                 while(true)                 {                     if (count2[S[start]] > 0)                     {                         if (count1[S[start]] < 0)                             count1[S[start]]++;                         else                             break;                     }                     start++;                 }                              if (minSize > end - start + 1)                 {                     minSize = end - start + 1;                     minStart = start;                 }             }         }                  if (minSize == INT_MAX)             return "";                  string ret(S, minStart, minSize);                  return ret;             } };