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LeetCode: Single Number
Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime comple...
分类:其他好文   时间:2014-05-23 07:22:48    阅读次数:241
[LeetCode] [Trapping Rain Water 2012-03-10]
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining....
分类:移动开发   时间:2014-05-23 03:59:43    阅读次数:364
【LeetCode】3Sum Closest
Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. You m...
分类:其他好文   时间:2014-05-23 03:21:10    阅读次数:287
[LeetCode] [Palindrome Number 2012-01-04]
Determine whether an integer is a palindrome. Do this without extra space.if use recursive, like check the first dig and last dig, then remove them, c...
分类:其他好文   时间:2014-05-23 02:45:15    阅读次数:230
【leetcode】Distinct Subsequences
问题:给定两个字符串S,T,对于S,可以删除其中的任意多个(包括0)字符,使其得到T。问有多少种删法可以得到T。 举例分析: S:ababa T: aba dp[i][j] : 表示 S 从0 ~ i - 1,T从0~j - 1,所得到的方法数。i,j 表示长度。 初始条件:dp[i][0] = 1,T为空串,而空串总是任意串的字串。即,将S串的所有字符都删掉,就得到T。 状态转移...
分类:其他好文   时间:2014-05-23 00:54:13    阅读次数:247
【leetcode】Max Points on a Line
题目:给定二维坐标上的若干点,找出这样一条线,属于该线的点数最多,返回点数。 分析:两个点确定了一条直线。共线,说明斜率相同。那么确定一个点A,该点与其他的点就会生成不同的斜率。这些斜率中,会存在相同的,那么这些相同的斜率就说明他们跟A在同一条直线上。 这里我们把斜率分成两种,一种是正常的斜率,就是可以写成 y = kx + b形式的k;一种就是横坐标相同,纵坐标不相同的,这时的斜率为无穷大。...
分类:其他好文   时间:2014-05-23 00:43:16    阅读次数:301
LeetCode: Permutations II [046]
【题目】 Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]. 【题意】 给定一个候选数集合,候选集中可能存在重复数,返回所有的排列 【思路】 ...
分类:其他好文   时间:2014-05-22 17:32:17    阅读次数:247
【LeetCode】3Sum
Given an arraySofnintegers, are there elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which gives the sum of zero.Note:Elemen...
分类:其他好文   时间:2014-05-22 16:53:52    阅读次数:173
LeetCode: Count and Say [037]
【题目】 The count-and-say sequence is the sequence of integers beginning as follows: 1, 11, 21, 1211, 111221, ... 1 is read off as "one 1" or 11. 11 is read off as "two 1s" or 21. 21 is read off as "one 2, then one 1" or 1211. Given an integer n, generate...
分类:其他好文   时间:2014-05-21 15:20:07    阅读次数:213
LeetCode: Multiply Strings [042]
【题目】 Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-negative. 【题意】 给定用字符串表示的整数,返回两个数的乘积结果字符串。两个数字都非负,且能任意大。 【思路】 1. 考虑其中一个数是0的情况 2. 模拟乘法运算...
分类:其他好文   时间:2014-05-21 13:45:37    阅读次数:214
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