Pascal's Triangle

Problem Statement

Given an integer numRows, return the first numRows of Pascal's triangle.

Code

Python Code

class Solution:
    def generate(self, numRows: int) -> List[List[int]]:

        ans = [[1]]

        for i in range(numRows-1):
            temp = [0] + ans[-1] + [0]
            row = []

            for j in range(len(ans[-1])+1):
                row.append(temp[j] + temp[j+1])

            ans.append(row)

        return ans