Problem Description:Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.Solution: 递归。 1 public List>...
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其他好文 时间:
2014-07-07 16:59:12
阅读次数:
169
Problem Description:Sort a linked list using insertion sort.Solution: 1 public class Solution { 2 public ListNode insertionSortList(ListNode head)...
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其他好文 时间:
2014-07-07 16:57:55
阅读次数:
117
Problem Description:Givennpoints on a 2D plane, find the maximum number of points that lie on the same straight line.Solution: 1 public int maxPoint.....
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其他好文 时间:
2014-07-07 16:55:19
阅读次数:
281
Problem Description:Sort a linked list inO(nlogn) time using constant space complexity.Solution: 1 public ListNode sortList(ListNode head) { 2 ...
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其他好文 时间:
2014-07-07 16:48:00
阅读次数:
238
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: ...
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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)...
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其他好文 时间:
2014-07-07 16:34:34
阅读次数:
208
Problem Description:Clone an undirected graph. Each node in the graph contains alabeland a list of itsneighbors.Solution: 1 public UndirectedGraph...
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其他好文 时间:
2014-07-07 16:11:57
阅读次数:
192
Problem Description:Given an array of integers, every element appearsthreetimes except for one. Find that single one.Solution:1 Arrays.sort(A...
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其他好文 时间:
2014-07-07 16:10:04
阅读次数:
174
【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...
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其他好文 时间:
2014-06-30 06:21:18
阅读次数:
334
题目
Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.
Follow up:
Did you use extra space?
A straight forward solution using O(mn) space is probab...
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其他好文 时间:
2014-06-30 06:17:09
阅读次数:
245