1505: 二叉树遍历(flist)
          Memory Limit:128 MB
          Time Limit:1.000 S
         
      
      
        
          Judge Style:Text Compare
          Creator:
      
      
          Submit:5
          Solved:3
      
Description

Output
	输出文件 flist.out 就一行,表示二叉树的先序序列。
Sample Input Copy
DBEAC
ABCDE
Sample Output Copy
ABDEC