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 adja 阅读全文

摘要：Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endp 阅读全文

摘要：Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after dividi 阅读全文