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转载自：http://blog.sina.com.cn/s/blog_90444ed201016iq6.html http://blog.csdn.net/zb1165048017/article/details/52785177 前言 最近要看一些论文做一下笔记，所以准备使用一下比较流行的Texl 阅读全文
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Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: Note: You may assume the 阅读全文
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Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文
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转载自： http://blog.csdn.net/dengjianqiang2011/article/details/8753807 MATLAB矩阵操作大全 一、矩阵的表示在MATLAB中创建矩阵有以下规则：a、矩阵元素必须在”[ ]”内；b、矩阵的同行元素之间用空格（或”,”）隔开；c、矩阵的 阅读全文
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转载自：增广拉格朗日乘子法（Augmented Lagrange Method） 增广拉格朗日乘子法的作用是用来解决等式约束下的优化问题， 假定需要求解的问题如下： minimize f(X) s.t.: h(X)=0 其中，f:Rn->R; h:Rn->Rm 朴素拉格朗日乘子法的解决方案是： L( 阅读全文
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Given a set of candidate numbers (C) (without duplicates) and a target number (T), find all unique combinations in C where the candidate numbers sums 阅读全文
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Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telepho 阅读全文
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Follow up for N-Queens problem. Now, instead outputting board configurations, return the total number of distinct solutions. 思路： 典型8皇后，回溯法，验证是否能放皇后位置， 阅读全文
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The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all 阅读全文
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Given an array of integers sorted in ascending order, find the starting and ending position of a given target value. Your algorithm's runtime complexi 阅读全文