问题 给出变量numRows,生成杨辉三角形的前numRows行. 例如,给出numRows＝5,返回: [     [1],    [1,1],   [1,2,1],  [1,3,3,1], [1,4,6,4,1]] 初始思路 基本算法和 杨辉三角形II(Pascal's Triangle II) 的基本一致.每算完一行的值将这些值拷贝一份到vector中即可.代码如下: class Solution { public: std::vector<std::vector<int> >…

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] ] 解决方案: vector<vector<int>> generate(int numRows) { vector<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] ] 解决方案: vector<vector<int>> generate(int numRows) { vector<vector<int>> res = {};…

118. 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<vector<int>> generate(int numRows) { vector<vector<…

118 - Pascal's 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] ] Solution: class Solution { public: vector<vector<int>> generate(int n…

题目 Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return 分析 构建数字金字塔,由上图可以清楚的找到规律. 该题目可用递归实现! 比较简单~ AC代码 class Solution { public: vector<vector<int>> generate(int numRows) { if (numRows == 0) ret…

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原文题目: 118. Pascal's Triangle 119. Pascal's Triangle II 读题: 杨辉三角问题 '''118''' class Solution(object): def generate(self, numRows): """ :type numRows: int :rtype: List[List[int]] """ if not numRows: return [] result = [] for i i…

1. 题目 1.1 英文题目 Given an integer rowIndex, return the rowIndexth (0-indexed) row of the Pascal's triangle. In Pascal's triangle, each number is the sum of the two numbers directly above it as shown: 1.2 中文题目 输出杨辉三角形的指定行 1.3输入输出 输入 输出 rowIndex = 3 [1,3…

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] 我们为了满足空间复杂度的要求,我们新建两个ArrayList,一个负责存储上一个Pascal行的结果,一个根据上一个Pascal行得出当前P…