1102 Invert a Binary Tree(25 分)
The following is from Max Howell @twitter:
Google: 90% of our engineers use the software you wrote (Homebrew), but you can't invert a binary tree on a whiteboard so fuck off.
Now it's your turn to prove that YOU CAN invert a binary tree!
Input Specification:
Each input file contains one test case. For each case, the first line gives a positive integer N (≤10) which is the total number of nodes in the tree -- and hence the nodes are numbered from 0 to N−1. Then N lines follow, each corresponds to a node from 0 to N−1, and gives the indices of the left and right children of the node. If the child does not exist, a -
will be put at the position. Any pair of children are separated by a space.
Output Specification:
For each test case, print in the first line the level-order, and then in the second line the in-order traversal sequences of the inverted tree. There must be exactly one space between any adjacent numbers, and no extra space at the end of the line.
Sample Input:
81 -- -0 -2 7- -- -5 -4 6
Sample Output:
3 7 2 6 4 0 5 16 5 7 4 3 2 0 1
题目大意:给出一颗二叉树,节点数<=10,可以说很少了,将其左右反转,就是原来的左子树变为右子树,递归进行,并且输出反转后的层次遍历和中序遍历。
我的代码:应该是正确的,但是在层次遍历中因为使用了递归,所以不好控制最后的空格,所以全部测试点格式错误0分,也不能通过传参标记来控制吧。那么也就是说不能通过递归来进行了?
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