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题目
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
无
代码
/**------------------------------------ * 日期:2015-02-06 * 作者:SJF0115 * 题目: 119.Pascal's Triangle II * 网址:https://oj.leetcode.com/problems/pascals-triangle-ii/ * 结果:AC * 来源:LeetCode * 博客: ---------------------------------------**/ #include#include #include using namespace std; class Solution { public: vector getRow(int rowIndex) { vector row(rowIndex+1); vector tmp = row; for (int i = 0;i < rowIndex+1;++i) { tmp[0] = tmp[i] = 1; for (int j = 1;j < i;++j) { tmp[j] = row[j-1] + row[j]; }//for row = tmp; }//for return row; } }; int main(){ Solution s; int n = 0; vector result = s.getRow(n); // 输出 for(int i = 0;i < result.size();++i){ cout< <<" "; }//for cout<
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