class Solution: def generate(self, numRows: int) -> List[List[int]]: try: res = [[1]] for i in range(numRows -1): temp = [0] + res[-1] +[0] row = [] for j in range(len(res[-1])+1): row.append(temp[j]+temp[j+1]) res.append(row) return res except Exception as e: print(e)