118. Pascal's Triangle (Array)

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<int>> result(numRows, vector<int>());
        if(numRows == ) return result;
        result[].push_back();
        for(int i =; i < numRows; i++)
        {
            result[i].push_back();
            for(int j = ; j<i;j++)
            {
                result[i].push_back(result[i-][j-]+result[i-][j]);
            }
            result[i].push_back();
        }
        return result;
    }
};