Question 1: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...
分类:
其他好文 时间:
2014-05-19 09:35:41
阅读次数:
321
题目:合并两个有序单链表思路:一开始想复杂了,以为必须在原链表上修改(绕来绕去还AC了,但是思路相当绕),其实没有,按照正常地合并两个数组同样的方法也对。代码:public
ListNode mergeTwoLists(ListNode l1, ListNode l2) { if(l1 ...
分类:
其他好文 时间:
2014-05-19 07:48:32
阅读次数:
314
【题目】
Divide two integers without using multiplication, division and mod operator.
【题意】
计算两个数的商,不能使用乘、除、取余操作
【思路】
用加法,确定多少除数相加其和恰好<=被除数
为了提高算法效率,利用贪心思想,采用滚雪球式的翻倍叠加策略,使和快速逼近被除数
集中特殊情况需要注意:
1. 结果是负数
...
分类:
其他好文 时间:
2014-05-18 10:42:00
阅读次数:
259
【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 constant space. You may not modify the values in the list, only nodes it...
分类:
其他好文 时间:
2014-05-18 08:37:57
阅读次数:
370
Given two numbers represented as strings,
return multiplication of the numbers as a string.Note: The numbers can be
arbitrarily large and are non-nega...
分类:
其他好文 时间:
2014-05-18 01:25:07
阅读次数:
288
【题目】
原文:
1.8 Assume you have a method isSubstring which checks if one word is a substring of another. Given two strings, s1 and s2, write code to check if s2 is a rotation of s1 using only one...
分类:
其他好文 时间:
2014-05-16 01:50:08
阅读次数:
311
【题目】
Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a contain...
分类:
其他好文 时间:
2014-05-16 01:32:47
阅读次数:
406
介绍ViewFlipper
ViewFlipper
Simple ViewAnimator that will animate between two or more views that have been added to it. Only one child is shown at a time. If requested, can automatically flip betwee...
分类:
其他好文 时间:
2014-05-15 18:37:44
阅读次数:
356
Given two binary strings, return their sum
(also a binary string).For example, a = "11" b = "1" Return "100".string
的操作,短string补位。两个“0”会输出一个“00”,要特殊处理...
分类:
其他好文 时间:
2014-05-15 17:47:57
阅读次数:
283
题意:给定两个代表数字的链表,每个节点里存放一个digit,数字是逆方向的,将这两个链表相加起来
思路:
1.i, j遍历l1,l2至最长,短的补零
2..设置一个进位变量c, 第i次遍历 l1,l2,c的和除以10进位,mod10留在这一位
3.出循环后还要检查是不是还有进位
复杂度:O(m+n), 空间O(m+n)...
分类:
其他好文 时间:
2014-05-15 13:38:03
阅读次数:
258