摘要： 1).2sum1.题意：找出数组中和为target的所有数对2.思路：排序数组，然后用两个指针i、j，一前一后，计算两个指针所指内容的和与target的关系，如果小于target，i右移，如果大于,j左移，否则为其中一个解3.时间复杂度：O(nlgn)+O(n)4.空间：O(1)5.代码： v... 阅读全文

摘要： Given a 2D board and a list of words from the dictionary, find all words in the board.Each word must be constructed from letters of sequentially adjac... 阅读全文

摘要： Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjace... 阅读全文