题目:https://leetcode.com/problems/two-sum/description/ stl map代码: class Solution { public: vector<int> twoSum(vector<int>& nums, int target) { map<int,int> m; vector<int> v; ;i < nums.size(); i++){ ){ v.push_back(m[target - n…

找遍所有路径,特判以根为起点的串即可. 代码: /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: ; map <int, int> m; int path…

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11, 15]…

LeetCode 1 Two Sum 解题报告 偶然间听见leetcode这个平台,这里面题量也不是很多200多题,打算平时有空在研究生期间就刷完,跟跟多的练习算法的人进行交流思想,一定的ACM算法积累可以对以后在对算法中优化带来好处.Ok,今天是我做的第一题Add Two Sum. 题目要求 Given an array of integers, find two numbers such that they add up to a specific target number. The fu…

一. 题目 1. Two Sum II 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 twoSum should return indices of the two numbers such that they add up to the ta…

题目:http://poj.org/problem?id=3096 题意:给定一个字符串S,从中找出所有有两个字符组成的子串,每当组成子串的字符之间隔着n字符时,如果没有相同的子串出现,则输出 "S is surprising." , 反之,则输出 "S is NOT surprising." . 例如 AABA 把它分成两个字符为一个整体的,1..相邻两个字符 AA,AB,BA 没有相同的;    2.隔一个字符的 AB AA 没有相同;          3.隔…

Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Input:nums = [1,1,1], k = 2 Output: 2 Note: The length of the array is in range [1, 20,000]. The range of numbers…

LeetCode one Two Sum (JAVA) 简介:给定一个数组和目标值,寻找数组中符合求和条件的两个数. 问题详解: 给定一个数据类型为int的数组,一个数据类型为int的目标值target,要求是在数组中寻求两个数字,使得两个数求和的值等于给定的target,要求以数组返回符合条件的索引. 技巧:可以假设数组中没有重复元素,因为我们只返回一个符合条件的数组,所以数组中只需要一个符合要求的数字就可以了. 举例: 给定数组 nums={5,8,7,2,11},target= 10, 因…

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11, 15]…

如何在const成员数中访问stl::map呢?例如如下代码: string ConfigFileManager::MapQueryItem(const string& name) const { if (_map_name_value.find(name) != _map_name_value.end()) { return _map_name_value[name]; } return ""; } 上面的代码会报错:error C2678: 二进制“[”: 没有找到接受“c…