Given an index k, return the kth row of the Pascal's triangle.
For example, given k = 3,
Return [1,3,3,1].
Note:
Could you optimize your algorithm to use only O(k) extra space?
思路:最简单的方法就是按...
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其他好文 时间:
2014-06-18 12:40:54
阅读次数:
265
题目
Given an array of integers, find two numbers such that they add up to a specific target number.
The function twoSum should return indices of the two numbers such that they add up to the...
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其他好文 时间:
2014-06-18 12:05:44
阅读次数:
244
题目
Given a digit string, return all possible letter combinations that the number could represent.
A mapping of digit to letters (just like on the telephone buttons) is given below.
In...
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其他好文 时间:
2014-06-18 12:03:16
阅读次数:
227
题目
Given a linked list, swap every two adjacent nodes and return its head.
For example,
Given 1->2->3->4, you should return the list as 2->1->4->3.
Your algorithm should use only const...
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其他好文 时间:
2014-06-18 11:53:39
阅读次数:
138
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.
For example,
If n = 4 and k = 2, a solution is:
[
[2,4],
[3,4],
[2,3],
[1,2],
[1,3],
[1,4],
]...
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其他好文 时间:
2014-06-18 11:41:52
阅读次数:
156
求一个大数N^N的值的最右边的数字,即最低位数字。
简单二分法求解就可以了。
不过注意会溢出,只要把N % 10之后,就不会溢出了,不用使用long long。
#include
int rightMost(int n, int N)
{
if (n == 0) return 1;
int t = rightMost(n / 2, N);
t = t * t % 10;;
...
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Web程序 时间:
2014-06-18 11:21:53
阅读次数:
243
1、
??
Reverse Linked List II
Reverse a linked list from position m to n. Do it in-place and in one-pass.
For example:
Given 1->2->3->4->5->NULL, m =
2 and n = 4,
return 1->4->3->2->5->NULL....
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其他好文 时间:
2014-06-17 23:03:12
阅读次数:
257
题目
Given a linked list, reverse the nodes of a linked list k at a time and return its modified list.
If the number of nodes is not a multiple of k then left-out nodes in the end should rem...
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其他好文 时间:
2014-06-17 22:15:52
阅读次数:
299
题目
Given a linked list, remove the nth node from the end of list and return its head.
For example,
Given linked list: 1->2->3->4->5, and n = 2.
After removing the second node from th...
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其他好文 时间:
2014-06-17 21:38:12
阅读次数:
193
题目
Merge k sorted
linked lists and return it as one sorted list. Analyze and describe its complexity.
方法
使用归并排序的思想,两两合并,直到最终变成一个。
public ListNode mergeKLists(ArrayList lists) {...
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其他好文 时间:
2014-06-17 21:34:41
阅读次数:
183