Gridland
Time Limit: 2 Seconds Memory Limit: 65536 KB
Background
For years, computer scientists have been trying to find efficient solutions to different computing problems. For some of them ef...
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其他好文 时间:
2015-04-28 14:07:48
阅读次数:
146
题目来自:Leetcode
https://leetcode.com/problems/count-primes/
Count Primes
Total Accepted: 831 Total
Submissions: 6167My Submissions
Question
Solution
Description:
...
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其他好文 时间:
2015-04-27 23:50:05
阅读次数:
174
网址:https://leetcode.com/problems/longest-substring-without-repeating-characters/
题意:
求出最长子字符串且不含重复字符
分析:
题意比较简单
只需要注意字符串为空的特殊情况.
字符是char的0-255,不仅仅是26个小写字母.
解法:
一直统计长度,直到有字符被重复为止,再记录被重复的字符的下一位...
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其他好文 时间:
2015-04-27 23:49:44
阅读次数:
126
网址: https://leetcode.com/problems/two-sum/
题意:
给一组数,给一个目标值.
这组数里有2个数的和等于目标值,求出这两个数的下标.
提示:
下标从1开始
明确一定有答案
分析:
一定有答案,从而不用对特殊情况进行考虑.
比如:
(1)一组数的长度小于2.
(2)没有答案
(3)和值等于2个相同下标的数的和
解法:
想法1:
排...
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其他好文 时间:
2015-04-27 21:56:37
阅读次数:
139
Hello World!
Time Limit: 1000ms Memory limit: 65536K 有疑问?点这里^_^
题目描述
We know that Ivan gives Saya three problems to solve (Problem F), and this is the
first problem.
“We nee...
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其他好文 时间:
2015-04-27 21:49:13
阅读次数:
162
网址:https://leetcode.com/problems/add-two-numbers/
题意:
可以用来做大数加法,
从低位开始两两相加,如果大于等于10,则进位
提示:
(1)l1为null 或 l2为null
(2)l1比l2长 或 l2比l1长
(3)l1和l2中的最高位仍然不足以表示两者的和,即需新建结点
解法1:
改变l1的值,
如果l1比l2短,则另接l...
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其他好文 时间:
2015-04-27 21:46:06
阅读次数:
113
leetcode -https://leetcode.com/problems/count-primes/Q:Description:Count the number of prime numbers less than a non-negative number,nHint:The number ...
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其他好文 时间:
2015-04-27 18:10:59
阅读次数:
230
题目链接:https://leetcode.com/problems/repeated-dna-sequences/
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is someti...
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其他好文 时间:
2015-04-27 09:58:50
阅读次数:
110
https://leetcode.com/problems/house-robber/You are a professional robber planning to rob houses along a street. Each house has a certain amount of mon...
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其他好文 时间:
2015-04-27 00:02:21
阅读次数:
217
https://leetcode.com/problems/happy-number/Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following ...
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移动开发 时间:
2015-04-26 22:38:15
阅读次数:
172