Description:A message containing letters fromA-Zis being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encoded m...
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其他好文 时间:
2014-08-01 04:39:01
阅读次数:
167
题目还原
Two Sum
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 t...
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其他好文 时间:
2014-08-01 02:25:11
阅读次数:
391
其实网上关于leetcode的题目的答案已经相当多了,这也是为啥我自己不把每道题目都贴出来的原因,觉得分析得没人好,代码也没别人的精简。不过,这道题目看到网上有不少做法跟实际要求的O(n)复杂度不太符合,所以特别粘贴出来,也正好记录下自己的一些想法。
说实话,在第二遍做这道题目的时候,我还是没能够把最为完善的解法想出来,能够想到的是利用hash表以序列值为key,1(只是简单做个标记)为v...
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其他好文 时间:
2014-07-31 21:01:41
阅读次数:
165
Problem H
{sum+=i++} to Reach N
Input: standard input
Output: standard output
Memory Limit: 32 MB
All the positive numbers can be expressed as a sum of one, two or more consecutive positive i...
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其他好文 时间:
2014-07-31 20:58:37
阅读次数:
199
Problem Description:
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...
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其他好文 时间:
2014-07-31 20:48:17
阅读次数:
215
Problem Description:
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbe...
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其他好文 时间:
2014-07-31 20:47:17
阅读次数:
215
Description
Recall the definition of the Fibonacci numbers:
f1 := 1
f2 := 2
fn := fn-1 + fn-2 (n>=3)
Given two numbers a and b, calculate how many Fibonacci numbers are in the range...
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其他好文 时间:
2014-07-31 17:11:07
阅读次数:
325
Description
The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i aj.
For a given sequence of numbers a1, a2, ..., an, if we move the ...
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其他好文 时间:
2014-07-31 13:31:46
阅读次数:
229
Problem DescriptionGive you three sequences of numbers A, B, C, then we give you a number X. Now you need to calculate if you can find the three numbe...
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其他好文 时间:
2014-07-31 12:54:46
阅读次数:
704
1 f [4] => e [3] => d [2] => c [1] => b [0] => a ) 9 */10 11 12 13 $numbers = array(1,2,3,4,5,6,7,8);14 arsort($numbers);15 print_r($numbers);16 /*...
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Web程序 时间:
2014-07-31 12:48:36
阅读次数:
222