Problem Description:Given a binary tree, return thepostordertraversal of its nodes' valuesSolution: 1 public List postorderTraversal(TreeNode root) { ...
分类:
其他好文 时间:
2014-07-07 16:45:23
阅读次数:
177
树的层次遍历,比较简单,3个题的做法完全一样,只是在特定的地方对结果进行reverse。1、Binary Tree Level Order Traversal/** * Definition for binary tree * struct TreeNode { * int val; * ...
分类:
其他好文 时间:
2014-07-07 16:39:56
阅读次数:
194
Problem Description:Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".Solution: ...
分类:
其他好文 时间:
2014-07-07 16:39:19
阅读次数:
163
Problem Description:Given a binary tree, return thepreordertraversal of its nodes' values.Solution: 1 public List preorderTraversal(TreeNode root)...
分类:
其他好文 时间:
2014-07-07 16:34:34
阅读次数:
208
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.For example,Given 1->2-...
分类:
其他好文 时间:
2014-07-07 16:17:00
阅读次数:
139
题目:Merge Two Sorted ListsMerge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the ...
分类:
其他好文 时间:
2014-07-07 14:06:19
阅读次数:
221
Problem Description:Evaluate the value of an arithmetic expression in Reverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integ...
分类:
其他好文 时间:
2014-06-30 14:32:54
阅读次数:
151
【题目】
Given a singly linked list L: L0→L1→…→Ln-1→Ln,
reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…
You must do this in-place without altering the nodes' values.
For example,
Given {1,2,3,4}, reorder it to {1,4,2,3}.
【题意】
给定一个链表L: L0→L1→…→Ln-1→Ln,对他重新排序成L...
分类:
其他好文 时间:
2014-06-30 10:11:14
阅读次数:
158
【题目】
Given a binary tree, return the postorder traversal of its nodes' values.
For example:
Given binary tree {1,#,2,3},
1
2
/
3
return [3,2,1].
Note: Recursive solution is trivial, could you do it iteratively?
【题意】
非递归实现后续遍...
分类:
其他好文 时间:
2014-06-30 10:10:10
阅读次数:
177
【题目】
Given a binary tree, return the preorder traversal of its nodes' values.
For example:
Given binary tree {1,#,2,3},
1
2
/
3
return [1,2,3].
Note: Recursive solution is trivial, could you do it iteratively?
【题意】
非递归返回先序遍历...
分类:
其他好文 时间:
2014-06-30 06:21:18
阅读次数:
334