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leetcode -- Add Binary
Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".class Solution {public: string addBinary(str...
分类:其他好文   时间:2014-05-30 08:39:11    阅读次数:270
[leetcode]Subsets @ Python
原题地址:https://oj.leetcode.com/problems/subsets/题意:枚举所有子集。解题思路:碰到这种问题,一律dfs。代码:class Solution: # @param S, a list of integer # @return a list of l...
分类:编程语言   时间:2014-05-30 04:31:09    阅读次数:1243
leetcode -- Best Time to Buy and Sell Stock
class Solution {public: int maxProfit(vector &prices) { if(prices.size() == 0) return 0; vector f1(prices.size()); int minV = pri...
分类:其他好文   时间:2014-05-30 02:54:28    阅读次数:231
leetcode -- Best Time to Buy and Sell Stock II
class Solution {public: int maxProfit(vector &prices) { if(prices.size() == 0) return 0; vector f(prices.size()); f[0] = 0; ...
分类:其他好文   时间:2014-05-30 02:46:12    阅读次数:318
【LeetCode】Rotate Image
Rotate ImageYou are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up: Could you do this in-place?最简...
分类:其他好文   时间:2014-05-29 23:02:38    阅读次数:254
Leetcode刷题录之Two Sum
题意大概是给出一个数列num,和一个目标数target,然后要找出数列中的两个数,使得这两个数之和等于目标数,输出这两个数的下标值(从1开始算)。 一个比较暴力的方法是用一个二重循环直接遍历序列,在第一重循环中找到a,在第二重循环中找到b,使得a+b=target,这种做法的时间复杂度是O(n^2....
分类:其他好文   时间:2014-05-29 21:01:06    阅读次数:307
Leetcode: Best Time to Buy and Sell Stock
My original thought was to calculate all the possible transactions by using nested loop. But got time limit excess error.I knew it can be done in O(n)...
分类:其他好文   时间:2014-05-29 20:44:37    阅读次数:271
Leetcode: Best Time to Buy and Sell Stock II
一次过,思路是:最大收益可以由所有上升序列差价叠加中获得 1 public class Solution { 2 public int maxProfit(int[] prices) { 3 int profit = 0; 4 if (prices.lengt...
分类:其他好文   时间:2014-05-29 20:43:33    阅读次数:254
leetcode -- 4sum
class Solution {public: vector > ret; vector subret;public: vector > fourSum(vector &num, int target) { sort(num.begin(),num.end()); ...
分类:其他好文   时间:2014-05-29 09:31:13    阅读次数:288
leetcode--Substring with Concatenation of All Words
You are given a string,S, and a list of words,L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenati...
分类:其他好文   时间:2014-05-29 09:09:35    阅读次数:222
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