Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] Subscribe to see which companies asked this question //解题思路:利用一个中间vector来保存每层的数 class Solution { pu…

Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? Hide Tags Array vector<int> getRow(int rowIndex) { vector<int> res…

Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] class Solution { public: std::vector<std::vector<int> > generate(int numRows) { std::vector&…

Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 思路:最简单的方法就是依照[Leetcode]Pascal's Triangle 的方式自顶向下依次求解,但会造成空间的浪费.若仅仅用一个vect…

Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] 原题链接:https://oj.leetcode.com/problems/pascals-triangle/ 题目 :给定n,生成n行的帕斯卡三角形. 思路:帕斯卡三角形 也就是 杨辉三角形,依据…

题目来自于Leetcode https://leetcode.com/problems/pascals-triangle/ Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] class Solution { public: vector<vecto…

@requires_authorization @author johnsondu @create_time 2015.7.23 19:54 @url [Pascal's Triangle](https://leetcode.com/problems/pascals-triangle/) /************************ * @description: simple. * @time_complexity: O(n) * @space_complexity: O(n) ****…

一. 题目描写叙述 Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return: [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] 二. 题目分析 关于帕斯卡三角形的定义,可參考:http://baike.baidu.com/link?url=qk_-urYQnO4v6v3P4BuMtCa0tMNUqJUk…

Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 原题链接:https://oj.leetcode.com/problems/pascals-triangle-ii/ 题目:给定一个索引k,返回帕…

题目:给定一个行索引index,返回帕斯卡三角形第index层的三角形 算法:生成index层帕斯卡三角形,并返回第index层三角形 public class Solution { public List<Integer> getRow(int rowIndex) { if (rowIndex < 0) { return null; } List<List<Integer>> pascalTriangle = new ArrayList<List<I…