Hacker_vision

题意        告诉你几个元素组成的数组nums[ ]和表示范围n，问最少向数组中添加多少元素使得从nums[ ]中若干元素之和能够覆盖[1..n]思路      cur表示当前能表示的范围为[1..cur],扫描nums[ ]，贪心原则如下：     若nums[i],把nums[i]添加进来，表示范围更新[1..cur+nums[i]];     若nums[i]>2*

这道题，我独立想了好久！！！！一道很好的思维题！！！！！！！！思路1是自己的求解方法O（nlogn），思路2是网上最优的解法O(n)，暴利O(n^2)肯定超时！题目链接：https://leetcode.com/problems/container-with-most-water/Given n non-negative integers a1, a2, .

题目链接：https://leetcode.com/problems/longest-common-prefix/Write a function to find the longest common prefix string amongst an array of strings.（最长公共前缀）解题思路：字典树。以任一串去查找，找到最长的且匹配数为n的即可，水题。

题目链接：https://leetcode.com/problems/two-sum/  （2-sum）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 inpu

题目链接：https://leetcode.com/problems/add-two-numbers/You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a si

题目链接：https://leetcode.com/problems/longest-substring-without-repeating-characters/Given a string, find the length of the longest substring without repeating characters.Examples:Given

题目链接：https://leetcode.com/problems/median-of-two-sorted-arrays/There are two sorted arrays nums1 and nums2 of size m and n respectively.Find the median of the two sorted arrays. The overall

题目链接：https://leetcode.com/problems/longest-palindromic-substring/Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000.Exampl